79856787976211 has 16 divisors (see below), whose sum is σ = 81576315886464. Its totient is φ = 78155330985984.

The previous prime is 79856787976193. The next prime is 79856787976223. The reversal of 79856787976211 is 11267978765897.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79856787976211 is a prime.

It is a super-2 number, since 2×79856787976211² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (83).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79856787976211.

It is not an unprimeable number, because it can be changed into a prime (79856787976241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 445532336 + ... + 445711538.

It is an arithmetic number, because the mean of its divisors is an integer number (5098519742904).

Almost surely, 2^{79856787976211} is an apocalyptic number.

79856787976211 is a deficient number, since it is larger than the sum of its proper divisors (1719527910253).

79856787976211 is a wasteful number, since it uses less digits than its factorization.

79856787976211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229570.

The product of its digits is 4480842240, while the sum is 83.

The spelling of 79856787976211 in words is "seventy-nine trillion, eight hundred fifty-six billion, seven hundred eighty-seven million, nine hundred seventy-six thousand, two hundred eleven".