1315409664 has 72 divisors (see below), whose sum is σ = 3507831040. Its totient is φ = 437603328.

The previous prime is 1315409657. The next prime is 1315409671. The reversal of 1315409664 is 4669045131.

It is an interprime number because it is at equal distance from previous prime (1315409657) and next prime (1315409671).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474009 + ... + 476775.

Almost surely, 2^1315409664 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 1315409664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1753915520).

1315409664 is an abundant number, since it is smaller than the sum of its proper divisors (2192421376).

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

1315409664 is an equidigital number, since it uses as much as digits as its factorization.

1315409664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3405 (or 3391 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 1315409664 is about 36268.5768124419. The cubic root of 1315409664 is about 1095.6882626999.

The spelling of 1315409664 in words is "one billion, three hundred fifteen million, four hundred nine thousand, six hundred sixty-four".