646462617855 has 16 divisors (see below), whose sum is σ = 1095183729504. Its totient is φ = 324498882560.

The previous prime is 646462617817. The next prime is 646462617881. The reversal of 646462617855 is 558716264646.

It is not a de Polignac number, because 646462617855 - 2⁸ = 646462617599 is a prime.

It is a congruent number.

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, 1267573506 + ... + 1267574015.

It is an arithmetic number, because the mean of its divisors is an integer number (68448983094).

Almost surely, 2^646462617855 is an apocalyptic number.

646462617855 is a deficient number, since it is larger than the sum of its proper divisors (448721111649).

646462617855 is a wasteful number, since it uses less digits than its factorization.

646462617855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2535147546.

The product of its digits is 58060800, while the sum is 60.

The spelling of 646462617855 in words is "six hundred forty-six billion, four hundred sixty-two million, six hundred seventeen thousand, eight hundred fifty-five".