646259498079 has 32 divisors (see below), whose sum is σ = 960983358720. Its totient is φ = 383769163008.

The previous prime is 646259498057. The next prime is 646259498083. The reversal of 646259498079 is 970894952646.

646259498079 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 646259498079 - 2¹¹ = 646259496031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646259498009) 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, 2182294 + ... + 2460675.

It is an arithmetic number, because the mean of its divisors is an integer number (30030729960).

Almost surely, 2^646259498079 is an apocalyptic number.

646259498079 is a deficient number, since it is larger than the sum of its proper divisors (314723860641).

646259498079 is a wasteful number, since it uses less digits than its factorization.

646259498079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643111.

The product of its (nonzero) digits is 235146240, while the sum is 69.

The spelling of 646259498079 in words is "six hundred forty-six billion, two hundred fifty-nine million, four hundred ninety-eight thousand, seventy-nine".