1311566994 has 48 divisors (see below), whose sum is σ = 2913273792. Its totient is φ = 426220704.

The previous prime is 1311566989. The next prime is 1311567077. The reversal of 1311566994 is 4996651131.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 522747 + ... + 525249.

It is an arithmetic number, because the mean of its divisors is an integer number (60693204).

Almost surely, 2^1311566994 is an apocalyptic number.

1311566994 is an abundant number, since it is smaller than the sum of its proper divisors (1601706798).

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

1311566994 is a wasteful number, since it uses less digits than its factorization.

1311566994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3231 (or 3228 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 1311566994 is about 36215.5628701253. The cubic root of 1311566994 is about 1094.6202874330.

The spelling of 1311566994 in words is "one billion, three hundred eleven million, five hundred sixty-six thousand, nine hundred ninety-four".