1215334664 has 16 divisors (see below), whose sum is σ = 2352261120. Its totient is φ = 588065040.

The previous prime is 1215334663. The next prime is 1215334667. The reversal of 1215334664 is 4664335121.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1215334661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2450024 + ... + 2450519.

It is an arithmetic number, because the mean of its divisors is an integer number (147016320).

Almost surely, 2^1215334664 is an apocalyptic number.

It is an amenable number.

1215334664 is a deficient number, since it is larger than the sum of its proper divisors (1136926456).

1215334664 is a wasteful number, since it uses less digits than its factorization.

1215334664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4900580 (or 4900576 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 1215334664 is about 34861.6503338554. The cubic root of 1215334664 is about 1067.1659547104.

Adding to 1215334664 its reverse (4664335121), we get a palindrome (5879669785).

The spelling of 1215334664 in words is "one billion, two hundred fifteen million, three hundred thirty-four thousand, six hundred sixty-four".