811861055 has 8 divisors (see below), whose sum is σ = 974915232. Its totient is φ = 649034208.

The previous prime is 811861021. The next prime is 811861069. The reversal of 811861055 is 550168118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 811861055 - 2⁸ = 811860799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48872 + ... + 63341.

It is an arithmetic number, because the mean of its divisors is an integer number (121864404).

Almost surely, 2^811861055 is an apocalyptic number.

811861055 is a deficient number, since it is larger than the sum of its proper divisors (163054177).

811861055 is a wasteful number, since it uses less digits than its factorization.

811861055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113665.

The product of its (nonzero) digits is 9600, while the sum is 35.

The square root of 811861055 is about 28493.1755864453. The cubic root of 811861055 is about 932.8831230748.

The spelling of 811861055 in words is "eight hundred eleven million, eight hundred sixty-one thousand, fifty-five".