68167556920 has 32 divisors (see below), whose sum is σ = 153501105600. Its totient is φ = 27244960128.

The previous prime is 68167556881. The next prime is 68167556969. The reversal of 68167556920 is 2965576186.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 639360 + ... + 738319.

It is an arithmetic number, because the mean of its divisors is an integer number (4796909550).

Almost surely, 2^68167556920 is an apocalyptic number.

It is an amenable number.

68167556920 is an abundant number, since it is smaller than the sum of its proper divisors (85333548680).

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

68167556920 is a wasteful number, since it uses less digits than its factorization.

68167556920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378927 (or 1378923 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 68167556920 in words is "sixty-eight billion, one hundred sixty-seven million, five hundred fifty-six thousand, nine hundred twenty".