79997579751 has 16 divisors (see below), whose sum is σ = 106910293248. Its totient is φ = 53208355200.

The previous prime is 79997579747. The next prime is 79997579777. The reversal of 79997579751 is 15797579997.

It is not a de Polignac number, because 79997579751 - 2² = 79997579747 is a prime.

It is a super-2 number, since 2×79997579751² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79997579731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8843791 + ... + 8852831.

It is an arithmetic number, because the mean of its divisors is an integer number (6681893328).

Almost surely, 2^79997579751 is an apocalyptic number.

79997579751 is a deficient number, since it is larger than the sum of its proper divisors (26912713497).

79997579751 is a wasteful number, since it uses less digits than its factorization.

79997579751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15542.

The product of its digits is 393824025, while the sum is 75.

The spelling of 79997579751 in words is "seventy-nine billion, nine hundred ninety-seven million, five hundred seventy-nine thousand, seven hundred fifty-one".