91734078841690 has 16 divisors (see below), whose sum is σ = 165402638930592. Its totient is φ = 36631121088784.

The previous prime is 91734078841673. The next prime is 91734078841709. The reversal of 91734078841690 is 9614887043719.

It is a super-2 number, since 2×91734078841690² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7813799824 + ... + 7813811563.

It is an arithmetic number, because the mean of its divisors is an integer number (10337664933162).

Almost surely, 2^{91734078841690} is an apocalyptic number.

91734078841690 is a deficient number, since it is larger than the sum of its proper divisors (73668560088902).

91734078841690 is a wasteful number, since it uses less digits than its factorization.

91734078841690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15627611981.

The product of its (nonzero) digits is 73156608, while the sum is 67.

The spelling of 91734078841690 in words is "ninety-one trillion, seven hundred thirty-four billion, seventy-eight million, eight hundred forty-one thousand, six hundred ninety".