1978005267000 has 1536 divisors, whose sum is σ = 8591347814400. Its totient is φ = 399826944000.

The previous prime is 1978005266989. The next prime is 1978005267001. The reversal of 1978005267000 is 7625008791.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978005267001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 1453346320 + ... + 1453347680.

It is an arithmetic number, because the mean of its divisors is an integer number (5593325400).

Almost surely, 2^{1978005267000} is an apocalyptic number.

1978005267000 is a gapful number since it is divisible by the number (10) 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 1978005267000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4295673907200).

1978005267000 is an abundant number, since it is smaller than the sum of its proper divisors (6613342547400).

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

1978005267000 is a wasteful number, since it uses less digits than its factorization.

1978005267000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494 (or 1477 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 1978005267000 in words is "one trillion, nine hundred seventy-eight billion, five million, two hundred sixty-seven thousand".