91512732542 has 32 divisors (see below), whose sum is σ = 171171221760. Its totient is φ = 35647951680.

The previous prime is 91512732529. The next prime is 91512732587. The reversal of 91512732542 is 24523721519.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 91512732542.

It is a congruent number.

It is an unprimeable number.

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, 864578 + ... + 964634.

It is an arithmetic number, because the mean of its divisors is an integer number (5349100680).

Almost surely, 2^91512732542 is an apocalyptic number.

91512732542 is a deficient number, since it is larger than the sum of its proper divisors (79658489218).

91512732542 is a wasteful number, since it uses less digits than its factorization.

91512732542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106016.

The product of its digits is 151200, while the sum is 41.

The spelling of 91512732542 in words is "ninety-one billion, five hundred twelve million, seven hundred thirty-two thousand, five hundred forty-two".