646429494297 has 16 divisors (see below), whose sum is σ = 907437508160. Its totient is φ = 408195640512.

The previous prime is 646429494257. The next prime is 646429494311. The reversal of 646429494297 is 792494924646.

It is not a de Polignac number, because 646429494297 - 2⁶ = 646429494233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646429494247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 739018 + ... + 1356099.

It is an arithmetic number, because the mean of its divisors is an integer number (56714844260).

Almost surely, 2^646429494297 is an apocalyptic number.

It is an amenable number.

646429494297 is a deficient number, since it is larger than the sum of its proper divisors (261008013863).

646429494297 is a wasteful number, since it uses less digits than its factorization.

646429494297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100552.

The product of its digits is 188116992, while the sum is 66.

The spelling of 646429494297 in words is "six hundred forty-six billion, four hundred twenty-nine million, four hundred ninety-four thousand, two hundred ninety-seven".