23978485512 has 256 divisors, whose sum is σ = 71207136000. Its totient is φ = 7461974016.

The previous prime is 23978485511. The next prime is 23978485529. The reversal of 23978485512 is 21558487932.

23978485512 is a `hidden beast` number, since 2 + 3 + 9 + 7 + 84 + 8 + 551 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (23978485511) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71152608 + ... + 71152944.

It is an arithmetic number, because the mean of its divisors is an integer number (278152875).

Almost surely, 2^23978485512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23978485512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35603568000).

23978485512 is an abundant number, since it is smaller than the sum of its proper divisors (47228650488).

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

23978485512 is a wasteful number, since it uses less digits than its factorization.

23978485512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725 (or 715 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The spelling of 23978485512 in words is "twenty-three billion, nine hundred seventy-eight million, four hundred eighty-five thousand, five hundred twelve".