1318044059721 has 27 divisors (see below), whose sum is σ = 2022509623303. Its totient is φ = 826971299520.

The previous prime is 1318044059681. The next prime is 1318044059729. The reversal of 1318044059721 is 1279504408131.

The square root of 1318044059721 is 1148061.

It is a perfect power (a square), and thus also a powerful number.

1318044059721 is a `hidden beast` number, since 1 + 3 + 18 + 0 + 4 + 40 + 597 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1026158870025 + 291885189696 = 1012995^2 + 540264^2 .

It is not a de Polignac number, because 1318044059721 - 2⁷ = 1318044059593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1318044059729) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 58539856 + ... + 58562366.

Almost surely, 2^{1318044059721} is an apocalyptic number.

1318044059721 is the 1148061-st square number.

1318044059721 is the 574031-st centered octagonal number.

It is an amenable number.

1318044059721 is a deficient number, since it is larger than the sum of its proper divisors (704465563582).

1318044059721 is an frugal number, since it uses more digits than its factorization.

1318044059721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45062 (or 22531 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 1318044059721 in words is "one trillion, three hundred eighteen billion, forty-four million, fifty-nine thousand, seven hundred twenty-one".