91659848690 has 8 divisors (see below), whose sum is σ = 164987727660. Its totient is φ = 36663939472.

The previous prime is 91659848677. The next prime is 91659848701. The reversal of 91659848690 is 9684895619.

It can be written as a sum of positive squares in 2 ways, for example, as 75046958809 + 16612889881 = 273947^2 + 128891^2 .

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

It is a super-2 number, since 2×91659848690² (a number of 23 digits) contains 22 as substring.

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, 4582992425 + ... + 4582992444.

Almost surely, 2^91659848690 is an apocalyptic number.

91659848690 is a deficient number, since it is larger than the sum of its proper divisors (73327878970).

91659848690 is a wasteful number, since it uses less digits than its factorization.

91659848690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9165984876.

The product of its (nonzero) digits is 33592320, while the sum is 65.

The spelling of 91659848690 in words is "ninety-one billion, six hundred fifty-nine million, eight hundred forty-eight thousand, six hundred ninety".