1316664725 has 12 divisors (see below), whose sum is σ = 1633126500. Its totient is φ = 1053033600.

The previous prime is 1316664691. The next prime is 1316664733. The reversal of 1316664725 is 5274666131.

It can be written as a sum of positive squares in 6 ways, for example, as 364695409 + 951969316 = 19097^2 + 30854^2 .

It is not a de Polignac number, because 1316664725 - 2¹² = 1316660629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139145 + ... + 148305.

It is an arithmetic number, because the mean of its divisors is an integer number (136093875).

Almost surely, 2^1316664725 is an apocalyptic number.

It is an amenable number.

1316664725 is a deficient number, since it is larger than the sum of its proper divisors (316461775).

1316664725 is an equidigital number, since it uses as much as digits as its factorization.

1316664725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14920 (or 14915 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 1316664725 is about 36285.8750066744. The cubic root of 1316664725 is about 1096.0366252723.

The spelling of 1316664725 in words is "one billion, three hundred sixteen million, six hundred sixty-four thousand, seven hundred twenty-five".