79843339232057 has 2 divisors, whose sum is σ = 79843339232058. Its totient is φ = 79843339232056.

The previous prime is 79843339232029. The next prime is 79843339232071. The reversal of 79843339232057 is 75023293334897.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79259331478441 + 584007753616 = 8902771^2 + 764204^2 .

It is a cyclic number.

It is not a de Polignac number, because 79843339232057 - 2²⁶ = 79843272123193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79843339231984 and 79843339232002.

It is not a weakly prime, because it can be changed into another prime (79843339222057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39921669616028 + 39921669616029.

It is an arithmetic number, because the mean of its divisors is an integer number (39921669616029).

Almost surely, 2^{79843339232057} is an apocalyptic number.

It is an amenable number.

79843339232057 is a deficient number, since it is larger than the sum of its proper divisors (1).

79843339232057 is an equidigital number, since it uses as much as digits as its factorization.

79843339232057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 205752960, while the sum is 65.

The spelling of 79843339232057 in words is "seventy-nine trillion, eight hundred forty-three billion, three hundred thirty-nine million, two hundred thirty-two thousand, fifty-seven".