79111009531 has 2 divisors, whose sum is σ = 79111009532. Its totient is φ = 79111009530.

The previous prime is 79111009469. The next prime is 79111009561. The reversal of 79111009531 is 13590011197.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79111009531 - 2¹⁷ = 79110878459 is a prime.

It is a super-2 number, since 2×79111009531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79111009561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39555504765 + 39555504766.

It is an arithmetic number, because the mean of its divisors is an integer number (39555504766).

Almost surely, 2^79111009531 is an apocalyptic number.

79111009531 is a deficient number, since it is larger than the sum of its proper divisors (1).

79111009531 is an equidigital number, since it uses as much as digits as its factorization.

79111009531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8505, while the sum is 37.

The spelling of 79111009531 in words is "seventy-nine billion, one hundred eleven million, nine thousand, five hundred thirty-one".