1215663364 has 12 divisors (see below), whose sum is σ = 2149343644. Its totient is φ = 601565184.

The previous prime is 1215663359. The next prime is 1215663433. The reversal of 1215663364 is 4633665121.

It can be written as a sum of positive squares in 2 ways, for example, as 490976964 + 724686400 = 22158^2 + 26920^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1566189 + ... + 1566964.

Almost surely, 2^1215663364 is an apocalyptic number.

It is an amenable number.

1215663364 is a deficient number, since it is larger than the sum of its proper divisors (933680280).

1215663364 is a wasteful number, since it uses less digits than its factorization.

1215663364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133254 (or 3133252 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 1215663364 is about 34866.3643645276. The cubic root of 1215663364 is about 1067.2621547779.

The spelling of 1215663364 in words is "one billion, two hundred fifteen million, six hundred sixty-three thousand, three hundred sixty-four".