23685656875540 has 48 divisors (see below), whose sum is σ = 54278277024384. Its totient is φ = 8610332745600.

The previous prime is 23685656875537. The next prime is 23685656875589. The reversal of 23685656875540 is 4557865658632.

It is a super-2 number, since 2×23685656875540² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23685656875540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15737439 + ... + 17176678.

It is an arithmetic number, because the mean of its divisors is an integer number (1130797438008).

Almost surely, 2^{23685656875540} is an apocalyptic number.

23685656875540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23685656875540 is an abundant number, since it is smaller than the sum of its proper divisors (30592620148844).

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

23685656875540 is a wasteful number, since it uses less digits than its factorization.

23685656875540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32917408 (or 32917406 counting only the distinct ones).

The product of its (nonzero) digits is 1451520000, while the sum is 70.

The spelling of 23685656875540 in words is "twenty-three trillion, six hundred eighty-five billion, six hundred fifty-six million, eight hundred seventy-five thousand, five hundred forty".