68720855 has 16 divisors (see below), whose sum is σ = 94877184. Its totient is φ = 46807200.

The previous prime is 68720833. The next prime is 68720887. The reversal of 68720855 is 55802786.

It is not a de Polignac number, because 68720855 - 2⁶ = 68720791 is a prime.

It is a Duffinian number.

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, 1217 + ... + 11786.

It is an arithmetic number, because the mean of its divisors is an integer number (5929824).

Almost surely, 2^68720855 is an apocalyptic number.

68720855 is a deficient number, since it is larger than the sum of its proper divisors (26156329).

68720855 is a wasteful number, since it uses less digits than its factorization.

68720855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13166.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 68720855 is about 8289.8042799574. The cubic root of 68720855 is about 409.6027383462.

The spelling of 68720855 in words is "sixty-eight million, seven hundred twenty thousand, eight hundred fifty-five".