79771113427 has 4 divisors (see below), whose sum is σ = 80027612496. Its totient is φ = 79514614360.

The previous prime is 79771113403. The next prime is 79771113481. The reversal of 79771113427 is 72431117797.

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

It is a cyclic number.

It is not a de Polignac number, because 79771113427 - 2¹⁹ = 79770589139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79772113427) 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, 128249068 + ... + 128249689.

It is an arithmetic number, because the mean of its divisors is an integer number (20006903124).

Almost surely, 2^79771113427 is an apocalyptic number.

79771113427 is a deficient number, since it is larger than the sum of its proper divisors (256499069).

79771113427 is a wasteful number, since it uses less digits than its factorization.

79771113427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256499068.

The product of its digits is 518616, while the sum is 49.

The spelling of 79771113427 in words is "seventy-nine billion, seven hundred seventy-one million, one hundred thirteen thousand, four hundred twenty-seven".