68631563 has 48 divisors (see below), whose sum is σ = 97241088. Its totient is φ = 47044800.

The previous prime is 68631539. The next prime is 68631571. The reversal of 68631563 is 36513686.

It is not a de Polignac number, because 68631563 - 2⁸ = 68631307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68631503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 253118 + ... + 253388.

It is an arithmetic number, because the mean of its divisors is an integer number (2025856).

Almost surely, 2^68631563 is an apocalyptic number.

68631563 is a deficient number, since it is larger than the sum of its proper divisors (28609525).

68631563 is a wasteful number, since it uses less digits than its factorization.

68631563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 325 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 68631563 is about 8284.4168774875. The cubic root of 68631563 is about 409.4252565614.

The spelling of 68631563 in words is "sixty-eight million, six hundred thirty-one thousand, five hundred sixty-three".