91605049944 has 32 divisors (see below), whose sum is σ = 229103259840. Its totient is φ = 30522932000.

The previous prime is 91605049937. The next prime is 91605049969. The reversal of 91605049944 is 44994050619.

It is a congruent number.

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, 693282 + ... + 814769.

It is an arithmetic number, because the mean of its divisors is an integer number (7159476870).

Almost surely, 2^91605049944 is an apocalyptic number.

It is an amenable number.

91605049944 is an abundant number, since it is smaller than the sum of its proper divisors (137498209896).

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

91605049944 is a wasteful number, since it uses less digits than its factorization.

91605049944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510591 (or 1510587 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 91605049944 in words is "ninety-one billion, six hundred five million, forty-nine thousand, nine hundred forty-four".