91339615044 has 36 divisors (see below), whose sum is σ = 244467794844. Its totient is φ = 28655565312.

The previous prime is 91339615033. The next prime is 91339615051. The reversal of 91339615044 is 44051693319.

91339615044 is a `hidden beast` number, since 9 + 133 + 9 + 6 + 1 + 504 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 63876496644 + 27463118400 = 252738^2 + 165720^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×91339615044² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74623257 + ... + 74624480.

It is an arithmetic number, because the mean of its divisors is an integer number (6790772079).

Almost surely, 2^91339615044 is an apocalyptic number.

It is an amenable number.

91339615044 is an abundant number, since it is smaller than the sum of its proper divisors (153128179800).

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

91339615044 is a wasteful number, since it uses less digits than its factorization.

91339615044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149247764 (or 149247759 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 91339615044 in words is "ninety-one billion, three hundred thirty-nine million, six hundred fifteen thousand, forty-four".