1813271464 has 16 divisors (see below), whose sum is σ = 3414734100. Its totient is φ = 902675712.

The previous prime is 1813271419. The next prime is 1813271489. The reversal of 1813271464 is 4641723181.

It can be written as a sum of positive squares in 2 ways, for example, as 1668068964 + 145202500 = 40842^2 + 12050^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493057 + ... + 496720.

Almost surely, 2^1813271464 is an apocalyptic number.

It is an amenable number.

1813271464 is a deficient number, since it is larger than the sum of its proper divisors (1601462636).

1813271464 is a wasteful number, since it uses less digits than its factorization.

1813271464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990012 (or 990008 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 1813271464 is about 42582.5253361047. The cubic root of 1813271464 is about 1219.4227009784.

The spelling of 1813271464 in words is "one billion, eight hundred thirteen million, two hundred seventy-one thousand, four hundred sixty-four".