79840635264 has 384 divisors, whose sum is σ = 259734121920. Its totient is φ = 23357030400.

The previous prime is 79840635229. The next prime is 79840635271. The reversal of 79840635264 is 46253604897.

79840635264 is a `hidden beast` number, since 79 + 8 + 40 + 6 + 3 + 526 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a self number, because there is not a number n which added to its sum of digits gives 79840635264.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66477864 + ... + 66479064.

Almost surely, 2^79840635264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79840635264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129867060960).

79840635264 is an abundant number, since it is smaller than the sum of its proper divisors (179893486656).

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

79840635264 is a wasteful number, since it uses less digits than its factorization.

79840635264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450 (or 1435 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 79840635264 in words is "seventy-nine billion, eight hundred forty million, six hundred thirty-five thousand, two hundred sixty-four".