68811156 has 36 divisors (see below), whose sum is σ = 175279104. Its totient is φ = 22760400.

The previous prime is 68811143. The next prime is 68811163. The reversal of 68811156 is 65111886.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 68811156.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2580 + ... + 12011.

It is an arithmetic number, because the mean of its divisors is an integer number (4868864).

Almost surely, 2^68811156 is an apocalyptic number.

It is an amenable number.

68811156 is an abundant number, since it is smaller than the sum of its proper divisors (106467948).

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

68811156 is a wasteful number, since it uses less digits than its factorization.

68811156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14732 (or 14727 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 68811156 is about 8295.2490016877. The cubic root of 68811156 is about 409.7820693893.

The spelling of 68811156 in words is "sixty-eight million, eight hundred eleven thousand, one hundred fifty-six".