1331561164 has 6 divisors (see below), whose sum is σ = 2330232044. Its totient is φ = 665780580.

The previous prime is 1331561123. The next prime is 1331561171. The reversal of 1331561164 is 4611651331.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166445142 + ... + 166445149.

Almost surely, 2^1331561164 is an apocalyptic number.

It is an amenable number.

1331561164 is a deficient number, since it is larger than the sum of its proper divisors (998670880).

1331561164 is a wasteful number, since it uses less digits than its factorization.

1331561164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332890295 (or 332890293 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 1331561164 is about 36490.5626703673. The cubic root of 1331561164 is about 1100.1545689130.

The spelling of 1331561164 in words is "one billion, three hundred thirty-one million, five hundred sixty-one thousand, one hundred sixty-four".