646597304563577 has 32 divisors (see below), whose sum is σ = 686431558287360. Its totient is φ = 608171147213760.

The previous prime is 646597304563417. The next prime is 646597304563589. The reversal of 646597304563577 is 775365403795646.

It is not a de Polignac number, because 646597304563577 - 2³⁶ = 646528585086841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646597304563498 and 646597304563507.

It is not an unprimeable number, because it can be changed into a prime (646597304560577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5714003324 + ... + 5714116482.

It is an arithmetic number, because the mean of its divisors is an integer number (21450986196480).

Almost surely, 2^{646597304563577} is an apocalyptic number.

It is an amenable number.

646597304563577 is a deficient number, since it is larger than the sum of its proper divisors (39834253723783).

646597304563577 is a wasteful number, since it uses less digits than its factorization.

646597304563577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145853.

The product of its (nonzero) digits is 12002256000, while the sum is 77.

The spelling of 646597304563577 in words is "six hundred forty-six trillion, five hundred ninety-seven billion, three hundred four million, five hundred sixty-three thousand, five hundred seventy-seven".