79503371640 has 512 divisors, whose sum is σ = 349845350400. Its totient is φ = 15548129280.

The previous prime is 79503371627. The next prime is 79503371671. The reversal of 79503371640 is 4617330597.

79503371640 is a `hidden beast` number, since 79 + 503 + 3 + 71 + 6 + 4 + 0 = 666.

It is a super-2 number, since 2×79503371640² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1385602 + ... + 1441838.

It is an arithmetic number, because the mean of its divisors is an integer number (683291700).

Almost surely, 2^79503371640 is an apocalyptic number.

79503371640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79503371640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174922675200).

79503371640 is an abundant number, since it is smaller than the sum of its proper divisors (270341978760).

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

79503371640 is a wasteful number, since it uses less digits than its factorization.

79503371640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56292 (or 56282 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 45.

The spelling of 79503371640 in words is "seventy-nine billion, five hundred three million, three hundred seventy-one thousand, six hundred forty".