91149144504 has 128 divisors (see below), whose sum is σ = 263543777280. Its totient is φ = 26007436800.

The previous prime is 91149144497. The next prime is 91149144533. The reversal of 91149144504 is 40544194119.

It is a super-2 number, since 2×91149144504² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 152302 + ... + 453314.

It is an arithmetic number, because the mean of its divisors is an integer number (2058935760).

Almost surely, 2^91149144504 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 91149144504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131771888640).

91149144504 is an abundant number, since it is smaller than the sum of its proper divisors (172394632776).

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

91149144504 is a wasteful number, since it uses less digits than its factorization.

91149144504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301101 (or 301097 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 91149144504 in words is "ninety-one billion, one hundred forty-nine million, one hundred forty-four thousand, five hundred four".