91997762334 has 16 divisors (see below), whose sum is σ = 185817263760. Its totient is φ = 30362297600.

The previous prime is 91997762327. The next prime is 91997762359. The reversal of 91997762334 is 43326779919.

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, 75905139 + ... + 75906350.

It is an arithmetic number, because the mean of its divisors is an integer number (11613578985).

Almost surely, 2^91997762334 is an apocalyptic number.

91997762334 is an abundant number, since it is smaller than the sum of its proper divisors (93819501426).

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

91997762334 is a wasteful number, since it uses less digits than its factorization.

91997762334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151811595.

The product of its digits is 15431472, while the sum is 60.

The spelling of 91997762334 in words is "ninety-one billion, nine hundred ninety-seven million, seven hundred sixty-two thousand, three hundred thirty-four".