68831564 has 6 divisors (see below), whose sum is σ = 120455244. Its totient is φ = 34415780.

The previous prime is 68831557. The next prime is 68831569. The reversal of 68831564 is 46513886.

It is not an unprimeable number, because it can be changed into a prime (68831569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8603942 + ... + 8603949.

It is an arithmetic number, because the mean of its divisors is an integer number (20075874).

Almost surely, 2^68831564 is an apocalyptic number.

It is an amenable number.

68831564 is a deficient number, since it is larger than the sum of its proper divisors (51623680).

68831564 is a wasteful number, since it uses less digits than its factorization.

68831564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17207895 (or 17207893 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 68831564 is about 8296.4790122075. The cubic root of 68831564 is about 409.8225764153.

The spelling of 68831564 in words is "sixty-eight million, eight hundred thirty-one thousand, five hundred sixty-four".