91900043883 has 24 divisors (see below), whose sum is σ = 138209512896. Its totient is φ = 61022565000.

The previous prime is 91900043881. The next prime is 91900043891. The reversal of 91900043883 is 38834000919.

It is not a de Polignac number, because 91900043883 - 2¹ = 91900043881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91900043881) 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, 692373 + ... + 814358.

It is an arithmetic number, because the mean of its divisors is an integer number (5758729704).

Almost surely, 2^91900043883 is an apocalyptic number.

91900043883 is a deficient number, since it is larger than the sum of its proper divisors (46309469013).

91900043883 is a wasteful number, since it uses less digits than its factorization.

91900043883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506997 (or 1506985 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 91900043883 in words is "ninety-one billion, nine hundred million, forty-three thousand, eight hundred eighty-three".