91871802374 has 12 divisors (see below), whose sum is σ = 151474583652. Its totient is φ = 41759910060.

The previous prime is 91871802329. The next prime is 91871802403. The reversal of 91871802374 is 47320817819.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 189817532 + ... + 189818015.

It is an arithmetic number, because the mean of its divisors is an integer number (12622881971).

Almost surely, 2^91871802374 is an apocalyptic number.

91871802374 is a deficient number, since it is larger than the sum of its proper divisors (59602781278).

91871802374 is a wasteful number, since it uses less digits than its factorization.

91871802374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379635571 (or 379635560 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 50.

The spelling of 91871802374 in words is "ninety-one billion, eight hundred seventy-one million, eight hundred two thousand, three hundred seventy-four".