91087052472 has 160 divisors (see below), whose sum is σ = 278624918880. Its totient is φ = 27631860480.

The previous prime is 91087052359. The next prime is 91087052479. The reversal of 91087052472 is 27425078019.

It is a happy number.

91087052472 is a `hidden beast` number, since 9 + 108 + 70 + 5 + 2 + 472 = 666.

It is a super-2 number, since 2×91087052472² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91087052479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 521958 + ... + 674250.

It is an arithmetic number, because the mean of its divisors is an integer number (1741405743).

Almost surely, 2^91087052472 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 91087052472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139312459440).

91087052472 is an abundant number, since it is smaller than the sum of its proper divisors (187537866408).

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

91087052472 is a wasteful number, since it uses less digits than its factorization.

91087052472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152395 (or 152382 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 91087052472 in words is "ninety-one billion, eighty-seven million, fifty-two thousand, four hundred seventy-two".