68511956 has 12 divisors (see below), whose sum is σ = 120375360. Its totient is φ = 34119000.

The previous prime is 68511931. The next prime is 68512001. The reversal of 68511956 is 65911586.

It is a super-2 number, since 2×68511956² = 9387776229891872, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 33116 + ... + 35123.

It is an arithmetic number, because the mean of its divisors is an integer number (10031280).

Almost surely, 2^68511956 is an apocalyptic number.

It is an amenable number.

68511956 is a deficient number, since it is larger than the sum of its proper divisors (51863404).

68511956 is a wasteful number, since it uses less digits than its factorization.

68511956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68494 (or 68492 counting only the distinct ones).

The product of its digits is 64800, while the sum is 41.

The square root of 68511956 is about 8277.1949354839. The cubic root of 68511956 is about 409.1872776127.

The spelling of 68511956 in words is "sixty-eight million, five hundred eleven thousand, nine hundred fifty-six".