1855812425 has 24 divisors (see below), whose sum is σ = 2337037920. Its totient is φ = 1461680000.

The previous prime is 1855812389. The next prime is 1855812451. The reversal of 1855812425 is 5242185581.

It is not a de Polignac number, because 1855812425 - 2¹⁶ = 1855746889 is a prime.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct 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, 556814 + ... + 560136.

It is an arithmetic number, because the mean of its divisors is an integer number (97376580).

Almost surely, 2^1855812425 is an apocalyptic number.

It is an amenable number.

1855812425 is a deficient number, since it is larger than the sum of its proper divisors (481225495).

1855812425 is a wasteful number, since it uses less digits than its factorization.

1855812425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673 (or 3668 counting only the distinct ones).

The product of its digits is 128000, while the sum is 41.

The square root of 1855812425 is about 43079.1414143783. The cubic root of 1855812425 is about 1228.8853287482.

The spelling of 1855812425 in words is "one billion, eight hundred fifty-five million, eight hundred twelve thousand, four hundred twenty-five".