1316644452 has 18 divisors (see below), whose sum is σ = 3328184678. Its totient is φ = 438881472.

The previous prime is 1316644421. The next prime is 1316644481. The reversal of 1316644452 is 2544466131.

1316644452 is a `hidden beast` number, since 1 + 3 + 1 + 6 + 644 + 4 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1064977956 + 251666496 = 32634^2 + 15864^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1316644452² = 3467105225964760608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 36573457 = 1316644452 / (1 + 3 + 1 + 6 + 6 + 4 + 4 + 4 + 5 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18286693 + ... + 18286764.

Almost surely, 2^1316644452 is an apocalyptic number.

1316644452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1316644452 is an abundant number, since it is smaller than the sum of its proper divisors (2011540226).

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

1316644452 is a wasteful number, since it uses less digits than its factorization.

1316644452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36573467 (or 36573462 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 1316644452 is about 36285.5956544742. The cubic root of 1316644452 is about 1096.0309999312.

The spelling of 1316644452 in words is "one billion, three hundred sixteen million, six hundred forty-four thousand, four hundred fifty-two".