481091886891 has 160 divisors (see below), whose sum is σ = 908027366400. Its totient is φ = 246576337920.

The previous prime is 481091886859. The next prime is 481091886923. The reversal of 481091886891 is 198688190184.

481091886891 is a `hidden beast` number, since 481 + 0 + 9 + 1 + 8 + 8 + 68 + 91 = 666.

It is an interprime number because it is at equal distance from previous prime (481091886859) and next prime (481091886923).

It is not a de Polignac number, because 481091886891 - 2⁵ = 481091886859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (481091836891) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 465722511 + ... + 465723543.

It is an arithmetic number, because the mean of its divisors is an integer number (5675171040).

Almost surely, 2^481091886891 is an apocalyptic number.

481091886891 is a deficient number, since it is larger than the sum of its proper divisors (426935479509).

481091886891 is a wasteful number, since it uses less digits than its factorization.

481091886891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991 (or 1982 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 63.

The spelling of 481091886891 in words is "four hundred eighty-one billion, ninety-one million, eight hundred eighty-six thousand, eight hundred ninety-one".