1816803477 has 12 divisors (see below), whose sum is σ = 2624641344. Its totient is φ = 1211031720.

The previous prime is 1816803467. The next prime is 1816803493. The reversal of 1816803477 is 7743086181.

1816803477 is a `hidden beast` number, since 18 + 168 + 0 + 3 + 477 = 666.

It is not a de Polignac number, because 1816803477 - 2⁷ = 1816803349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816803437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116038 + ... + 130760.

It is an arithmetic number, because the mean of its divisors is an integer number (218720112).

Almost surely, 2^1816803477 is an apocalyptic number.

It is an amenable number.

1816803477 is a deficient number, since it is larger than the sum of its proper divisors (807837867).

1816803477 is a wasteful number, since it uses less digits than its factorization.

1816803477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28440 (or 28437 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 1816803477 is about 42623.9777238117. The cubic root of 1816803477 is about 1220.2139455035.

The spelling of 1816803477 in words is "one billion, eight hundred sixteen million, eight hundred three thousand, four hundred seventy-seven".