1313571616 has 36 divisors (see below), whose sum is σ = 3008317158. Its totient is φ = 562958592.

The previous prime is 1313571599. The next prime is 1313571619. The reversal of 1313571616 is 6161753131.

It can be written as a sum of positive squares in only one way, i.e., 1082410000 + 231161616 = 32900^2 + 15204^2 .

It is not an unprimeable number, because it can be changed into a prime (1313571619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 417301 + ... + 420436.

Almost surely, 2^1313571616 is an apocalyptic number.

1313571616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1313571616 is an abundant number, since it is smaller than the sum of its proper divisors (1694745542).

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

1313571616 is an equidigital number, since it uses as much as digits as its factorization.

1313571616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837761 (or 837746 counting only the distinct ones).

The product of its digits is 11340, while the sum is 34.

The square root of 1313571616 is about 36243.2285537588. The cubic root of 1313571616 is about 1095.1776825013.

The spelling of 1313571616 in words is "one billion, three hundred thirteen million, five hundred seventy-one thousand, six hundred sixteen".