646794496835 has 16 divisors (see below), whose sum is σ = 776998607616. Its totient is φ = 516872437728.

The previous prime is 646794496759. The next prime is 646794496867. The reversal of 646794496835 is 538694497646.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646794496835 is a prime.

It is a super-2 number, since 2×646794496835² (a number of 24 digits) contains 22 as substring.

It is a Duffinian 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, 18229082 + ... + 18264528.

It is an arithmetic number, because the mean of its divisors is an integer number (48562412976).

Almost surely, 2^646794496835 is an apocalyptic number.

646794496835 is a deficient number, since it is larger than the sum of its proper divisors (130204110781).

646794496835 is a wasteful number, since it uses less digits than its factorization.

646794496835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39322.

The product of its digits is 940584960, while the sum is 71.

The spelling of 646794496835 in words is "six hundred forty-six billion, seven hundred ninety-four million, four hundred ninety-six thousand, eight hundred thirty-five".