91859861883 has 16 divisors (see below), whose sum is σ = 123765984000. Its totient is φ = 60597544800.

The previous prime is 91859861861. The next prime is 91859861921. The reversal of 91859861883 is 38816895819.

It is a happy number.

It is not a de Polignac number, because 91859861883 - 2¹⁷ = 91859730811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91859961883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425578 + ... + 604016.

It is an arithmetic number, because the mean of its divisors is an integer number (7735374000).

Almost surely, 2^91859861883 is an apocalyptic number.

91859861883 is a deficient number, since it is larger than the sum of its proper divisors (31906122117).

91859861883 is a wasteful number, since it uses less digits than its factorization.

91859861883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180242.

The product of its digits is 29859840, while the sum is 66.

The spelling of 91859861883 in words is "ninety-one billion, eight hundred fifty-nine million, eight hundred sixty-one thousand, eight hundred eighty-three".