315661448997 has 24 divisors (see below), whose sum is σ = 470727598848. Its totient is φ = 203624884800.

The previous prime is 315661448953. The next prime is 315661449029. The reversal of 315661448997 is 799844166513.

315661448997 is a `hidden beast` number, since 3 + 1 + 5 + 6 + 61 + 4 + 489 + 97 = 666.

It is not a de Polignac number, because 315661448997 - 2¹⁴ = 315661432613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315661448197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2090122 + ... + 2236052.

It is an arithmetic number, because the mean of its divisors is an integer number (19613649952).

Almost surely, 2^315661448997 is an apocalyptic number.

It is an amenable number.

315661448997 is a deficient number, since it is larger than the sum of its proper divisors (155066149851).

315661448997 is a wasteful number, since it uses less digits than its factorization.

315661448997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153721 (or 153718 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The spelling of 315661448997 in words is "three hundred fifteen billion, six hundred sixty-one million, four hundred forty-eight thousand, nine hundred ninety-seven".