79078600057 has 4 divisors (see below), whose sum is σ = 81215859556. Its totient is φ = 76941340560.

The previous prime is 79078600049. The next prime is 79078600093. The reversal of 79078600057 is 75000687097.

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 76027584361 + 3051015696 = 275731^2 + 55236^2 .

It is a cyclic number.

It is not a de Polignac number, because 79078600057 - 2³ = 79078600049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79078600957) 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, 1068629694 + ... + 1068629767.

It is an arithmetic number, because the mean of its divisors is an integer number (20303964889).

Almost surely, 2^79078600057 is an apocalyptic number.

It is an amenable number.

79078600057 is a deficient number, since it is larger than the sum of its proper divisors (2137259499).

79078600057 is a wasteful number, since it uses less digits than its factorization.

79078600057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137259498.

The product of its (nonzero) digits is 740880, while the sum is 49.

The spelling of 79078600057 in words is "seventy-nine billion, seventy-eight million, six hundred thousand, fifty-seven".