1989976937472 has 616 divisors, whose sum is σ = 6322273476960. Its totient is φ = 624010936320.

The previous prime is 1989976937467. The next prime is 1989976937477. The reversal of 1989976937472 is 2747396799891.

1989976937472 is a `hidden beast` number, since 1 + 9 + 89 + 9 + 7 + 69 + 3 + 7 + 472 = 666.

It is an interprime number because it is at equal distance from previous prime (1989976937467) and next prime (1989976937477).

It is a Harshad number since it is a multiple of its sum of digits (81).

Its product of digits (2592487296) is a multiple of the sum of its prime divisors (1008).

It is a junction number, because it is equal to n+sod(n) for n = 1989976937391 and 1989976937400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989976937477) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2453731947 + ... + 2453732757.

Almost surely, 2^{1989976937472} is an apocalyptic number.

1989976937472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989976937472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3161136738480).

1989976937472 is an abundant number, since it is smaller than the sum of its proper divisors (4332296539488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1989976937472 is an equidigital number, since it uses as much as digits as its factorization.

1989976937472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041 (or 1008 counting only the distinct ones).

The product of its digits is 2592487296, while the sum is 81.

The spelling of 1989976937472 in words is "one trillion, nine hundred eighty-nine billion, nine hundred seventy-six million, nine hundred thirty-seven thousand, four hundred seventy-two".