642612546635 has 16 divisors (see below), whose sum is σ = 773767987200. Its totient is φ = 512335407840.

The previous prime is 642612546619. The next prime is 642612546649. The reversal of 642612546635 is 536645216246.

642612546635 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 642612546635 - 2⁴ = 642612546619 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, 8357174 + ... + 8433716.

It is an arithmetic number, because the mean of its divisors is an integer number (48360499200).

Almost surely, 2^642612546635 is an apocalyptic number.

642612546635 is a deficient number, since it is larger than the sum of its proper divisors (131155440565).

642612546635 is a wasteful number, since it uses less digits than its factorization.

642612546635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82258.

The product of its digits is 6220800, while the sum is 50.

The spelling of 642612546635 in words is "six hundred forty-two billion, six hundred twelve million, five hundred forty-six thousand, six hundred thirty-five".