68857432563 has 16 divisors (see below), whose sum is σ = 93984002816. Its totient is φ = 44818794720.

The previous prime is 68857432547. The next prime is 68857432597. The reversal of 68857432563 is 36523475886.

It is not a de Polignac number, because 68857432563 - 2⁴ = 68857432547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68857432663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204858 + ... + 423888.

It is an arithmetic number, because the mean of its divisors is an integer number (5874000176).

Almost surely, 2^68857432563 is an apocalyptic number.

68857432563 is a deficient number, since it is larger than the sum of its proper divisors (25126570253).

68857432563 is a wasteful number, since it uses less digits than its factorization.

68857432563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221514.

The product of its digits is 29030400, while the sum is 57.

The spelling of 68857432563 in words is "sixty-eight billion, eight hundred fifty-seven million, four hundred thirty-two thousand, five hundred sixty-three".