91883574087 has 16 divisors (see below), whose sum is σ = 122852474880. Its totient is φ = 61085277792.

The previous prime is 91883574071. The next prime is 91883574121. The reversal of 91883574087 is 78047538819.

It is not a de Polignac number, because 91883574087 - 2⁴ = 91883574071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91883574087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91883574017) 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, 5974714 + ... + 5990072.

It is an arithmetic number, because the mean of its divisors is an integer number (7678279680).

Almost surely, 2^91883574087 is an apocalyptic number.

91883574087 is a deficient number, since it is larger than the sum of its proper divisors (30968900793).

91883574087 is a wasteful number, since it uses less digits than its factorization.

91883574087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20782.

The product of its (nonzero) digits is 13547520, while the sum is 60.

The spelling of 91883574087 in words is "ninety-one billion, eight hundred eighty-three million, five hundred seventy-four thousand, eighty-seven".