79715084540 has 432 divisors, whose sum is σ = 230040953856. Its totient is φ = 22918533120.

The previous prime is 79715084513. The next prime is 79715084587. The reversal of 79715084540 is 4548051797.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 208133189 + ... + 208133571.

It is an arithmetic number, because the mean of its divisors is an integer number (532502208).

Almost surely, 2^79715084540 is an apocalyptic number.

79715084540 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 79715084540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115020476928).

79715084540 is an abundant number, since it is smaller than the sum of its proper divisors (150325869316).

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

79715084540 is a wasteful number, since it uses less digits than its factorization.

79715084540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 79715084540 in words is "seventy-nine billion, seven hundred fifteen million, eighty-four thousand, five hundred forty".