91131427734 has 16 divisors (see below), whose sum is σ = 182269221888. Its totient is φ = 30376081512.

The previous prime is 91131427693. The next prime is 91131427759. The reversal of 91131427734 is 43772413119.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 67882 + ... + 432285.

It is an arithmetic number, because the mean of its divisors is an integer number (11391826368).

Almost surely, 2^91131427734 is an apocalyptic number.

91131427734 is an abundant number, since it is smaller than the sum of its proper divisors (91137794154).

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

91131427734 is a wasteful number, since it uses less digits than its factorization.

91131427734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530539.

The product of its digits is 127008, while the sum is 42.

The spelling of 91131427734 in words is "ninety-one billion, one hundred thirty-one million, four hundred twenty-seven thousand, seven hundred thirty-four".