642517262585 has 32 divisors (see below), whose sum is σ = 867865646592. Its totient is φ = 452627988480.

The previous prime is 642517262531. The next prime is 642517262599. The reversal of 642517262585 is 585262715246.

It is not a de Polignac number, because 642517262585 - 2⁶ = 642517262521 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1030472 + ... + 1531961.

It is an arithmetic number, because the mean of its divisors is an integer number (27120801456).

Almost surely, 2^642517262585 is an apocalyptic number.

It is an amenable number.

642517262585 is a deficient number, since it is larger than the sum of its proper divisors (225348384007).

642517262585 is a wasteful number, since it uses less digits than its factorization.

642517262585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562593.

The product of its digits is 8064000, while the sum is 53.

The spelling of 642517262585 in words is "six hundred forty-two billion, five hundred seventeen million, two hundred sixty-two thousand, five hundred eighty-five".