1989479358944 has 48 divisors (see below), whose sum is σ = 4883267523456. Its totient is φ = 775121827200.

The previous prime is 1989479358931. The next prime is 1989479358947. The reversal of 1989479358944 is 4498539749891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989479358947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403706822 + ... + 403711749.

It is an arithmetic number, because the mean of its divisors is an integer number (101734740072).

Almost surely, 2^{1989479358944} is an apocalyptic number.

1989479358944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1989479358944 is an abundant number, since it is smaller than the sum of its proper divisors (2893788164512).

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

1989479358944 is a wasteful number, since it uses less digits than its factorization.

1989479358944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807418599 (or 807418591 counting only the distinct ones).

The product of its digits is 2821754880, while the sum is 80.

The spelling of 1989479358944 in words is "one trillion, nine hundred eighty-nine billion, four hundred seventy-nine million, three hundred fifty-eight thousand, nine hundred forty-four".