642072584685 has 32 divisors (see below), whose sum is σ = 1174107174912. Its totient is φ = 293510998080.

The previous prime is 642072584677. The next prime is 642072584729. The reversal of 642072584685 is 586485270246.

642072584685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642072584685 - 2³ = 642072584677 is a prime.

It is a Curzon number.

It is a congruent 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, 5900742 + ... + 6008568.

It is an arithmetic number, because the mean of its divisors is an integer number (36690849216).

Almost surely, 2^642072584685 is an apocalyptic number.

It is an amenable number.

642072584685 is a deficient number, since it is larger than the sum of its proper divisors (532034590227).

642072584685 is a wasteful number, since it uses less digits than its factorization.

642072584685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164553.

The product of its (nonzero) digits is 25804800, while the sum is 57.

The spelling of 642072584685 in words is "six hundred forty-two billion, seventy-two million, five hundred eighty-four thousand, six hundred eighty-five".