1311663552 has 28 divisors (see below), whose sum is σ = 3470443656. Its totient is φ = 437221120.

The previous prime is 1311663523. The next prime is 1311663583. The reversal of 1311663552 is 2553661131.

It is a super-2 number, since 2×1311663552² = 3440922547290513408, which contains 22 as substring.

It is a congruent number.

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, 3415599 + ... + 3415982.

Almost surely, 2^1311663552 is an apocalyptic number.

1311663552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311663552 is an abundant number, since it is smaller than the sum of its proper divisors (2158780104).

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

1311663552 is an equidigital number, since it uses as much as digits as its factorization.

1311663552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6831596 (or 6831586 counting only the distinct ones).

The product of its digits is 16200, while the sum is 33.

The square root of 1311663552 is about 36216.8959465054. The cubic root of 1311663552 is about 1094.6471488775.

The spelling of 1311663552 in words is "one billion, three hundred eleven million, six hundred sixty-three thousand, five hundred fifty-two".