315783164779 has 2 divisors, whose sum is σ = 315783164780. Its totient is φ = 315783164778.

The previous prime is 315783164771. The next prime is 315783164797. The reversal of 315783164779 is 977461387513.

Together with next prime (315783164797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315783164779 - 2³ = 315783164771 is a prime.

It is a super-2 number, since 2×315783164779² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315783164771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157891582389 + 157891582390.

It is an arithmetic number, because the mean of its divisors is an integer number (157891582390).

Almost surely, 2^315783164779 is an apocalyptic number.

315783164779 is a deficient number, since it is larger than the sum of its proper divisors (1).

315783164779 is an equidigital number, since it uses as much as digits as its factorization.

315783164779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26671680, while the sum is 61.

The spelling of 315783164779 in words is "three hundred fifteen billion, seven hundred eighty-three million, one hundred sixty-four thousand, seven hundred seventy-nine".