811854081 has 24 divisors (see below), whose sum is σ = 1181431680. Its totient is φ = 537213600.

The previous prime is 811854073. The next prime is 811854107. The reversal of 811854081 is 180458118.

It is a happy number.

It is not a de Polignac number, because 811854081 - 2³ = 811854073 is a prime.

It is a super-2 number, since 2×811854081² = 1318214097672709122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (811854011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1227891 + ... + 1228551.

It is an arithmetic number, because the mean of its divisors is an integer number (49226320).

Almost surely, 2^811854081 is an apocalyptic number.

It is an amenable number.

811854081 is a deficient number, since it is larger than the sum of its proper divisors (369577599).

811854081 is a wasteful number, since it uses less digits than its factorization.

811854081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477 (or 1474 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 36.

The square root of 811854081 is about 28493.0532060009. The cubic root of 811854081 is about 932.8804518683.

The spelling of 811854081 in words is "eight hundred eleven million, eight hundred fifty-four thousand, eighty-one".