68155872 has 24 divisors (see below), whose sum is σ = 178909416. Its totient is φ = 22718592.

The previous prime is 68155859. The next prime is 68155883. The reversal of 68155872 is 27855186.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354883 + ... + 355074.

It is an arithmetic number, because the mean of its divisors is an integer number (7454559).

Almost surely, 2^68155872 is an apocalyptic number.

It is an amenable number.

68155872 is an abundant number, since it is smaller than the sum of its proper divisors (110753544).

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

68155872 is a wasteful number, since it uses less digits than its factorization.

68155872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709970 (or 709962 counting only the distinct ones).

The product of its digits is 134400, while the sum is 42.

The square root of 68155872 is about 8255.6569696179. The cubic root of 68155872 is about 408.4771426640.

The spelling of 68155872 in words is "sixty-eight million, one hundred fifty-five thousand, eight hundred seventy-two".