68711356920 has 64 divisors (see below), whose sum is σ = 206152302240. Its totient is φ = 18321408000.

The previous prime is 68711356897. The next prime is 68711356943. The reversal of 68711356920 is 2965311786.

It is an interprime number because it is at equal distance from previous prime (68711356897) and next prime (68711356943).

It is a self number, because there is not a number n which added to its sum of digits gives 68711356920.

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, 2028120 + ... + 2061720.

Almost surely, 2^68711356920 is an apocalyptic number.

68711356920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68711356920 is an abundant number, since it is smaller than the sum of its proper divisors (137440945320).

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

68711356920 is a wasteful number, since it uses less digits than its factorization.

68711356920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50656 (or 50652 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 68711356920 in words is "sixty-eight billion, seven hundred eleven million, three hundred fifty-six thousand, nine hundred twenty".