68431563 has 12 divisors (see below), whose sum is σ = 100521720. Its totient is φ = 44847456.

The previous prime is 68431553. The next prime is 68431567. The reversal of 68431563 is 36513486.

68431563 is a `hidden beast` number, since 68 + 4 + 31 + 563 = 666.

It is not a de Polignac number, because 68431563 - 2²² = 64237259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68431567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63906 + ... + 64967.

It is an arithmetic number, because the mean of its divisors is an integer number (8376810).

Almost surely, 2^68431563 is an apocalyptic number.

68431563 is a deficient number, since it is larger than the sum of its proper divisors (32090157).

68431563 is a wasteful number, since it uses less digits than its factorization.

68431563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128938 (or 128935 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 68431563 is about 8272.3372150801. The cubic root of 68431563 is about 409.0271660548.

The spelling of 68431563 in words is "sixty-eight million, four hundred thirty-one thousand, five hundred sixty-three".