79791532057 has 2 divisors, whose sum is σ = 79791532058. Its totient is φ = 79791532056.

The previous prime is 79791532043. The next prime is 79791532123. The reversal of 79791532057 is 75023519797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76554035856 + 3237496201 = 276684^2 + 56899^2 .

It is an emirp because it is prime and its reverse (75023519797) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79791532057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79791531989 and 79791532007.

It is not a weakly prime, because it can be changed into another prime (79791532157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39895766028 + 39895766029.

It is an arithmetic number, because the mean of its divisors is an integer number (39895766029).

Almost surely, 2^79791532057 is an apocalyptic number.

It is an amenable number.

79791532057 is a deficient number, since it is larger than the sum of its proper divisors (1).

79791532057 is an equidigital number, since it uses as much as digits as its factorization.

79791532057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4167450, while the sum is 55.

The spelling of 79791532057 in words is "seventy-nine billion, seven hundred ninety-one million, five hundred thirty-two thousand, fifty-seven".