68631556 has 24 divisors (see below), whose sum is σ = 140067200. Its totient is φ = 29412936.

The previous prime is 68631539. The next prime is 68631571. The reversal of 68631556 is 65513686.

It is a super-2 number, since 2×68631556² = 9420580957962272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23640 + ... + 26383.

Almost surely, 2^68631556 is an apocalyptic number.

It is an amenable number.

68631556 is an abundant number, since it is smaller than the sum of its proper divisors (71435644).

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

68631556 is a wasteful number, since it uses less digits than its factorization.

68631556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50048 (or 50032 counting only the distinct ones).

The product of its digits is 129600, while the sum is 40.

The square root of 68631556 is about 8284.4164550076. The cubic root of 68631556 is about 409.4252426418.

The spelling of 68631556 in words is "sixty-eight million, six hundred thirty-one thousand, five hundred fifty-six".