64979479791 has 12 divisors (see below), whose sum is σ = 93865882968. Its totient is φ = 43316591184.

The previous prime is 64979479777. The next prime is 64979479841. The reversal of 64979479791 is 19797497946.

64979479791 is a `hidden beast` number, since 6 + 497 + 9 + 47 + 9 + 7 + 91 = 666.

64979479791 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 64979479791 - 2¹⁴ = 64979463407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64979479771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116820 + ... + 378953.

It is an arithmetic number, because the mean of its divisors is an integer number (7822156914).

Almost surely, 2^64979479791 is an apocalyptic number.

64979479791 is a deficient number, since it is larger than the sum of its proper divisors (28886403177).

64979479791 is a wasteful number, since it uses less digits than its factorization.

64979479791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510342 (or 510339 counting only the distinct ones).

The product of its digits is 216040608, while the sum is 72.

The spelling of 64979479791 in words is "sixty-four billion, nine hundred seventy-nine million, four hundred seventy-nine thousand, seven hundred ninety-one".