91315511698 has 8 divisors (see below), whose sum is σ = 138303105408. Its totient is φ = 45214476564.

The previous prime is 91315511671. The next prime is 91315511719. The reversal of 91315511698 is 89611551319.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221639386 + ... + 221639797.

It is an arithmetic number, because the mean of its divisors is an integer number (17287888176).

Almost surely, 2^91315511698 is an apocalyptic number.

91315511698 is a deficient number, since it is larger than the sum of its proper divisors (46987593710).

91315511698 is a wasteful number, since it uses less digits than its factorization.

91315511698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443279288.

The product of its digits is 291600, while the sum is 49.

The spelling of 91315511698 in words is "ninety-one billion, three hundred fifteen million, five hundred eleven thousand, six hundred ninety-eight".