642635525536246 has 24 divisors (see below), whose sum is σ = 1059563120758632. Its totient is φ = 292103980581600.

The previous prime is 642635525536237. The next prime is 642635525536271.

642635525536246 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9119701 + ... + 36992431.

It is an arithmetic number, because the mean of its divisors is an integer number (44148463364943).

Almost surely, 2^{642635525536246} is an apocalyptic number.

642635525536246 is a deficient number, since it is larger than the sum of its proper divisors (416927595222386).

642635525536246 is a wasteful number, since it uses less digits than its factorization.

642635525536246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27968028 (or 27968017 counting only the distinct ones).

The product of its digits is 933120000, while the sum is 64.

The spelling of 642635525536246 in words is "six hundred forty-two trillion, six hundred thirty-five billion, five hundred twenty-five million, five hundred thirty-six thousand, two hundred forty-six".