91384729488 has 60 divisors (see below), whose sum is σ = 275423426460. Its totient is φ = 28118377728.

The previous prime is 91384729463. The next prime is 91384729489. The reversal of 91384729488 is 88492748319.

91384729488 is a `hidden beast` number, since 9 + 1 + 3 + 84 + 72 + 9 + 488 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28868728464 + 62516001024 = 169908^2 + 250032^2 .

It is not an unprimeable number, because it can be changed into a prime (91384729489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24406443 + ... + 24410186.

It is an arithmetic number, because the mean of its divisors is an integer number (4590390441).

Almost surely, 2^91384729488 is an apocalyptic number.

It is an amenable number.

91384729488 is an abundant number, since it is smaller than the sum of its proper divisors (184038696972).

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

91384729488 is a wasteful number, since it uses less digits than its factorization.

91384729488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48816656 (or 48816647 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The spelling of 91384729488 in words is "ninety-one billion, three hundred eighty-four million, seven hundred twenty-nine thousand, four hundred eighty-eight".