91531508794 has 32 divisors (see below), whose sum is σ = 155412887616. Its totient is φ = 40063403520.

The previous prime is 91531508779. The next prime is 91531508797. The reversal of 91531508794 is 49780513519.

It is not an unprimeable number, because it can be changed into a prime (91531508797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500664 + ... + 658579.

It is an arithmetic number, because the mean of its divisors is an integer number (4856652738).

Almost surely, 2^91531508794 is an apocalyptic number.

91531508794 is a deficient number, since it is larger than the sum of its proper divisors (63881378822).

91531508794 is a wasteful number, since it uses less digits than its factorization.

91531508794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159390.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 91531508794 in words is "ninety-one billion, five hundred thirty-one million, five hundred eight thousand, seven hundred ninety-four".