646563542642 has 8 divisors (see below), whose sum is σ = 976822618800. Its totient is φ = 320956003044.

The previous prime is 646563542633. The next prime is 646563542743. The reversal of 646563542642 is 246245365646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1162883792 + ... + 1162884347.

It is an arithmetic number, because the mean of its divisors is an integer number (122102827350).

Almost surely, 2^646563542642 is an apocalyptic number.

646563542642 is a deficient number, since it is larger than the sum of its proper divisors (330259076158).

646563542642 is a wasteful number, since it uses less digits than its factorization.

646563542642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2325768280.

The product of its digits is 24883200, while the sum is 53.

The spelling of 646563542642 in words is "six hundred forty-six billion, five hundred sixty-three million, five hundred forty-two thousand, six hundred forty-two".