79293721515 has 16 divisors (see below), whose sum is σ = 128033901600. Its totient is φ = 41902002432.

The previous prime is 79293721483. The next prime is 79293721519. The reversal of 79293721515 is 51512739297.

It is a happy number.

It is not a de Polignac number, because 79293721515 - 2⁵ = 79293721483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79293721519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24247210 + ... + 24250479.

It is an arithmetic number, because the mean of its divisors is an integer number (8002118850).

Almost surely, 2^79293721515 is an apocalyptic number.

79293721515 is a deficient number, since it is larger than the sum of its proper divisors (48740180085).

79293721515 is a wasteful number, since it uses less digits than its factorization.

79293721515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48497806.

The product of its digits is 1190700, while the sum is 51.

The spelling of 79293721515 in words is "seventy-nine billion, two hundred ninety-three million, seven hundred twenty-one thousand, five hundred fifteen".