646259498076 has 12 divisors (see below), whose sum is σ = 1507938828872. Its totient is φ = 215419832688.

The previous prime is 646259498057. The next prime is 646259498083. The reversal of 646259498076 is 670894952646.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 646259497998 and 646259498016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26927479075 + ... + 26927479098.

Almost surely, 2^646259498076 is an apocalyptic number.

It is an amenable number.

646259498076 is an abundant number, since it is smaller than the sum of its proper divisors (861679330796).

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

646259498076 is a wasteful number, since it uses less digits than its factorization.

646259498076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53854958180 (or 53854958178 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 66.

The spelling of 646259498076 in words is "six hundred forty-six billion, two hundred fifty-nine million, four hundred ninety-eight thousand, seventy-six".