1812345057 has 8 divisors (see below), whose sum is σ = 2684955680. Its totient is φ = 1208230020.

The previous prime is 1812345023. The next prime is 1812345079. The reversal of 1812345057 is 7505432181.

1812345057 is a `hidden beast` number, since 181 + 23 + 450 + 5 + 7 = 666.

It is not a de Polignac number, because 1812345057 - 2⁸ = 1812344801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1812345257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33561919 + ... + 33561972.

It is an arithmetic number, because the mean of its divisors is an integer number (335619460).

Almost surely, 2^1812345057 is an apocalyptic number.

It is an amenable number.

1812345057 is a deficient number, since it is larger than the sum of its proper divisors (872610623).

1812345057 is an equidigital number, since it uses as much as digits as its factorization.

1812345057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67123900 (or 67123894 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 1812345057 is about 42571.6461626750. The cubic root of 1812345057 is about 1219.2149964346.

The spelling of 1812345057 in words is "one billion, eight hundred twelve million, three hundred forty-five thousand, fifty-seven".