642486563875 has 16 divisors (see below), whose sum is σ = 863501944032. Its totient is φ = 474451615200.

The previous prime is 642486563863. The next prime is 642486563963. The reversal of 642486563875 is 578365684246.

It is not a de Polignac number, because 642486563875 - 2⁹ = 642486563363 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197686549 + ... + 197689798.

It is an arithmetic number, because the mean of its divisors is an integer number (53968871502).

Almost surely, 2^642486563875 is an apocalyptic number.

642486563875 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

642486563875 is a deficient number, since it is larger than the sum of its proper divisors (221015380157).

642486563875 is a wasteful number, since it uses less digits than its factorization.

642486563875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395376375 (or 395376365 counting only the distinct ones).

The product of its digits is 232243200, while the sum is 64.

The spelling of 642486563875 in words is "six hundred forty-two billion, four hundred eighty-six million, five hundred sixty-three thousand, eight hundred seventy-five".