68715855 has 48 divisors (see below), whose sum is σ = 129650976. Its totient is φ = 33465600.

The previous prime is 68715733. The next prime is 68715869. The reversal of 68715855 is 55851786.

68715855 is a `hidden beast` number, since 68 + 7 + 1 + 585 + 5 = 666.

It is not a de Polignac number, because 68715855 - 2⁷ = 68715727 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 68715855.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58504 + ... + 59666.

It is an arithmetic number, because the mean of its divisors is an integer number (2701062).

Almost surely, 2^68715855 is an apocalyptic number.

68715855 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

68715855 is a deficient number, since it is larger than the sum of its proper divisors (60935121).

68715855 is a wasteful number, since it uses less digits than its factorization.

68715855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288 (or 1285 counting only the distinct ones).

The product of its digits is 336000, while the sum is 45.

The square root of 68715855 is about 8289.5026991973. The cubic root of 68715855 is about 409.5928041307.

The spelling of 68715855 in words is "sixty-eight million, seven hundred fifteen thousand, eight hundred fifty-five".