79977612377 has 4 divisors (see below), whose sum is σ = 86129736420. Its totient is φ = 73825488336.

The previous prime is 79977612373. The next prime is 79977612401. The reversal of 79977612377 is 77321677997.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52376441881 + 27601170496 = 228859^2 + 166136^2 .

It is a cyclic number.

It is not a de Polignac number, because 79977612377 - 2² = 79977612373 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79977612373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3076062002 + ... + 3076062027.

It is an arithmetic number, because the mean of its divisors is an integer number (21532434105).

Almost surely, 2^79977612377 is an apocalyptic number.

It is an amenable number.

79977612377 is a deficient number, since it is larger than the sum of its proper divisors (6152124043).

79977612377 is a wasteful number, since it uses less digits than its factorization.

79977612377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6152124042.

The product of its digits is 49009212, while the sum is 65.

The spelling of 79977612377 in words is "seventy-nine billion, nine hundred seventy-seven million, six hundred twelve thousand, three hundred seventy-seven".