319166345977 has 2 divisors, whose sum is σ = 319166345978. Its totient is φ = 319166345976.

The previous prime is 319166345951. The next prime is 319166346007. The reversal of 319166345977 is 779543661913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271054555641 + 48111790336 = 520629^2 + 219344^2 .

It is a cyclic number.

It is not a de Polignac number, because 319166345977 - 2²⁷ = 319032128249 is a prime.

It is not a weakly prime, because it can be changed into another prime (319166345077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159583172988 + 159583172989.

It is an arithmetic number, because the mean of its divisors is an integer number (159583172989).

Almost surely, 2^319166345977 is an apocalyptic number.

It is an amenable number.

319166345977 is a deficient number, since it is larger than the sum of its proper divisors (1).

319166345977 is an equidigital number, since it uses as much as digits as its factorization.

319166345977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25719120, while the sum is 61.

The spelling of 319166345977 in words is "three hundred nineteen billion, one hundred sixty-six million, three hundred forty-five thousand, nine hundred seventy-seven".