91555155472 has 160 divisors (see below), whose sum is σ = 204274925568. Its totient is φ = 39372480000.

The previous prime is 91555155469. The next prime is 91555155487. The reversal of 91555155472 is 27455155519.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49195822 + ... + 49197682.

Almost surely, 2^91555155472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91555155472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102137462784).

91555155472 is an abundant number, since it is smaller than the sum of its proper divisors (112719770096).

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

91555155472 is a wasteful number, since it uses less digits than its factorization.

91555155472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109 (or 2103 counting only the distinct ones).

The product of its digits is 1575000, while the sum is 49.

The spelling of 91555155472 in words is "ninety-one billion, five hundred fifty-five million, one hundred fifty-five thousand, four hundred seventy-two".