1315917518355 has 128 divisors (see below), whose sum is σ = 2695677050880. Its totient is φ = 603079344000.

The previous prime is 1315917518341. The next prime is 1315917518359. The reversal of 1315917518355 is 5538157195131.

1315917518355 is a `hidden beast` number, since 1 + 3 + 1 + 5 + 91 + 7 + 518 + 35 + 5 = 666.

It is not a de Polignac number, because 1315917518355 - 2⁵ = 1315917518323 is a prime.

It is a super-2 number, since 2×1315917518355² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1315917518359) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1647120 + ... + 2311890.

It is an arithmetic number, because the mean of its divisors is an integer number (21059976960).

Almost surely, 2^{1315917518355} is an apocalyptic number.

1315917518355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1315917518355 is an abundant number, since it is smaller than the sum of its proper divisors (1379759532525).

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

1315917518355 is a wasteful number, since it uses less digits than its factorization.

1315917518355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664870 (or 664864 counting only the distinct ones).

The product of its digits is 2835000, while the sum is 54.

The spelling of 1315917518355 in words is "one trillion, three hundred fifteen billion, nine hundred seventeen million, five hundred eighteen thousand, three hundred fifty-five".