315997218896 has 90 divisors (see below), whose sum is σ = 639952051050. Its totient is φ = 151144874496.

The previous prime is 315997218869. The next prime is 315997218923. The reversal of 315997218896 is 698812799513.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (315997218869) and next prime (315997218923).

It can be written as a sum of positive squares in 9 ways, for example, as 50834015296 + 265163203600 = 225464^2 + 514940^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 795962570 + ... + 795962966.

It is an arithmetic number, because the mean of its divisors is an integer number (7110578345).

Almost surely, 2^315997218896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 315997218896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319976025525).

315997218896 is an abundant number, since it is smaller than the sum of its proper divisors (323954832154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

315997218896 is an equidigital number, since it uses as much as digits as its factorization.

315997218896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009 (or 577 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 68.

The spelling of 315997218896 in words is "three hundred fifteen billion, nine hundred ninety-seven million, two hundred eighteen thousand, eight hundred ninety-six".