79961873077 has 4 divisors (see below), whose sum is σ = 79999970400. Its totient is φ = 79923775756.

The previous prime is 79961873051. The next prime is 79961873093. The reversal of 79961873077 is 77037816997.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79961873077 - 2³⁵ = 45602134709 is a prime.

It is a super-2 number, since 2×79961873077² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79961873377) 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 3 ways as a sum of consecutive naturals, for example, 19045513 + ... + 19049710.

It is an arithmetic number, because the mean of its divisors is an integer number (19999992600).

Almost surely, 2^79961873077 is an apocalyptic number.

It is an amenable number.

79961873077 is a deficient number, since it is larger than the sum of its proper divisors (38097323).

79961873077 is a wasteful number, since it uses less digits than its factorization.

79961873077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38097322.

The product of its (nonzero) digits is 28005264, while the sum is 64.

The spelling of 79961873077 in words is "seventy-nine billion, nine hundred sixty-one million, eight hundred seventy-three thousand, seventy-seven".