91728597437374 has 16 divisors (see below), whose sum is σ = 140803916402160. Its totient is φ = 44794128113280.

The previous prime is 91728597437311. The next prime is 91728597437381. The reversal of 91728597437374 is 47373479582719.

It is a self number, because there is not a number n which added to its sum of digits gives 91728597437374.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41280187 + ... + 43445494.

It is an arithmetic number, because the mean of its divisors is an integer number (8800244775135).

Almost surely, 2^{91728597437374} is an apocalyptic number.

91728597437374 is a deficient number, since it is larger than the sum of its proper divisors (49075318964786).

91728597437374 is a wasteful number, since it uses less digits than its factorization.

91728597437374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84738315.

The product of its digits is 2240421120, while the sum is 76.

The spelling of 91728597437374 in words is "ninety-one trillion, seven hundred twenty-eight billion, five hundred ninety-seven million, four hundred thirty-seven thousand, three hundred seventy-four".