1318459690564 has 27 divisors (see below), whose sum is σ = 2313659621847. Its totient is φ = 657419067648.

The previous prime is 1318459690553. The next prime is 1318459690573. The reversal of 1318459690564 is 4650969548131.

It is a happy number.

The square root of 1318459690564 is 1148242.

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

It can be written as a sum of positive squares in 4 ways, for example, as 378645776964 + 939813913600 = 615342^2 + 969440^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1306698892 + ... + 1306699900.

Almost surely, 2^{1318459690564} is an apocalyptic number.

1318459690564 is the 1148242-nd square number.

It is an amenable number.

1318459690564 is a deficient number, since it is larger than the sum of its proper divisors (995199931283).

1318459690564 is an frugal number, since it uses more digits than its factorization.

1318459690564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160 (or 1580 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 61.

The spelling of 1318459690564 in words is "one trillion, three hundred eighteen billion, four hundred fifty-nine million, six hundred ninety thousand, five hundred sixty-four".