23645157780 has 48 divisors (see below), whose sum is σ = 66333605184. Its totient is φ = 6293264640.

The previous prime is 23645157779. The next prime is 23645157787. The reversal of 23645157780 is 8775154632.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23645157787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346942 + ... + 409461.

It is an arithmetic number, because the mean of its divisors is an integer number (1381950108).

Almost surely, 2^23645157780 is an apocalyptic number.

23645157780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23645157780 is an abundant number, since it is smaller than the sum of its proper divisors (42688447404).

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

23645157780 is a wasteful number, since it uses less digits than its factorization.

23645157780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756936 (or 756934 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 23645157780 in words is "twenty-three billion, six hundred forty-five million, one hundred fifty-seven thousand, seven hundred eighty".