23767928640 has 84 divisors (see below), whose sum is σ = 81751781124. Its totient is φ = 6338113536.

The previous prime is 23767928629. The next prime is 23767928699. The reversal of 23767928640 is 4682976732.

It can be written as a sum of positive squares in 2 ways, for example, as 8891735616 + 14876193024 = 94296^2 + 121968^2 .

It is a super-2 number, since 2×23767928640² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4123497 + ... + 4129256.

Almost surely, 2^23767928640 is an apocalyptic number.

23767928640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23767928640 is an abundant number, since it is smaller than the sum of its proper divisors (57983852484).

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

23767928640 is a wasteful number, since it uses less digits than its factorization.

23767928640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8252776 (or 8252763 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The spelling of 23767928640 in words is "twenty-three billion, seven hundred sixty-seven million, nine hundred twenty-eight thousand, six hundred forty".