646601808354 has 32 divisors (see below), whose sum is σ = 1300501319040. Its totient is φ = 214318887552.

The previous prime is 646601808283. The next prime is 646601808401. The reversal of 646601808354 is 453808106646.

It is a junction number, because it is equal to n+sod(n) for n = 646601808297 and 646601808306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1954102 + ... + 2260910.

It is an arithmetic number, because the mean of its divisors is an integer number (40640666220).

Almost surely, 2^646601808354 is an apocalyptic number.

646601808354 is an abundant number, since it is smaller than the sum of its proper divisors (653899510686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646601808354 is a wasteful number, since it uses less digits than its factorization.

646601808354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308794.

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 646601808354 in words is "six hundred forty-six billion, six hundred one million, eight hundred eight thousand, three hundred fifty-four".