315617156031649 has 2 divisors, whose sum is σ = 315617156031650. Its totient is φ = 315617156031648.

The previous prime is 315617156031601. The next prime is 315617156031763. The reversal of 315617156031649 is 946130651716513.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314832501990400 + 784654041249 = 17743520^2 + 885807^2 .

It is a cyclic number.

It is not a de Polignac number, because 315617156031649 - 2⁴¹ = 313418132776097 is a prime.

It is a super-2 number, since 2×315617156031649² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 315617156031593 and 315617156031602.

It is not a weakly prime, because it can be changed into another prime (315617156031949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157808578015824 + 157808578015825.

It is an arithmetic number, because the mean of its divisors is an integer number (157808578015825).

Almost surely, 2^{315617156031649} is an apocalyptic number.

It is an amenable number.

315617156031649 is a deficient number, since it is larger than the sum of its proper divisors (1).

315617156031649 is an equidigital number, since it uses as much as digits as its factorization.

315617156031649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12247200, while the sum is 58.

The spelling of 315617156031649 in words is "three hundred fifteen trillion, six hundred seventeen billion, one hundred fifty-six million, thirty-one thousand, six hundred forty-nine".