23557961528 has 32 divisors (see below), whose sum is σ = 47485267200. Its totient is φ = 10921604832.

The previous prime is 23557961527. The next prime is 23557961543. The reversal of 23557961528 is 82516975532.

It is a self number, because there is not a number n which added to its sum of digits gives 23557961528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23557961521) 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, 1641650 + ... + 1655937.

It is an arithmetic number, because the mean of its divisors is an integer number (1483914600).

Almost surely, 2^23557961528 is an apocalyptic number.

It is an amenable number.

23557961528 is an abundant number, since it is smaller than the sum of its proper divisors (23927305672).

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

23557961528 is a wasteful number, since it uses less digits than its factorization.

23557961528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297659 (or 3297655 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 53.

The spelling of 23557961528 in words is "twenty-three billion, five hundred fifty-seven million, nine hundred sixty-one thousand, five hundred twenty-eight".