91045555044 has 24 divisors (see below), whose sum is σ = 212681887488. Its totient is φ = 30313909920.

The previous prime is 91045555019. The next prime is 91045555057. The reversal of 91045555044 is 44055554019.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 91045554987 and 91045555005.

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, 4315092 + ... + 4336139.

It is an arithmetic number, because the mean of its divisors is an integer number (8861745312).

Almost surely, 2^91045555044 is an apocalyptic number.

It is an amenable number.

91045555044 is an abundant number, since it is smaller than the sum of its proper divisors (121636332444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91045555044 is a wasteful number, since it uses less digits than its factorization.

91045555044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8652115 (or 8652113 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 91045555044 in words is "ninety-one billion, forty-five million, five hundred fifty-five thousand, forty-four".