1811859652 has 12 divisors (see below), whose sum is σ = 3177377280. Its totient is φ = 904037576.

The previous prime is 1811859649. The next prime is 1811859671. The reversal of 1811859652 is 2569581181.

It is a happy number.

It is a super-2 number, since 2×1811859652² = 6565670797091122208, which contains 22 as substring.

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, 470908 + ... + 474739.

It is an arithmetic number, because the mean of its divisors is an integer number (264781440).

Almost surely, 2^1811859652 is an apocalyptic number.

It is an amenable number.

1811859652 is a deficient number, since it is larger than the sum of its proper divisors (1365517628).

1811859652 is a wasteful number, since it uses less digits than its factorization.

1811859652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946130 (or 946128 counting only the distinct ones).

The product of its digits is 172800, while the sum is 46.

The square root of 1811859652 is about 42565.9447445960. The cubic root of 1811859652 is about 1219.1061382278.

The spelling of 1811859652 in words is "one billion, eight hundred eleven million, eight hundred fifty-nine thousand, six hundred fifty-two".