10891298665 has 16 divisors (see below), whose sum is σ = 14528941056. Its totient is φ = 7783358400.

The previous prime is 10891298623. The next prime is 10891298687. The reversal of 10891298665 is 56689219801.

It is not a de Polignac number, because 10891298665 - 2²³ = 10882910057 is a prime.

It is a super-2 number, since 2×10891298665² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2700541 + ... + 2704570.

It is an arithmetic number, because the mean of its divisors is an integer number (908058816).

Almost surely, 2^10891298665 is an apocalyptic number.

It is an amenable number.

10891298665 is a deficient number, since it is larger than the sum of its proper divisors (3637642391).

10891298665 is a wasteful number, since it uses less digits than its factorization.

10891298665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5405160.

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 10891298665 in words is "ten billion, eight hundred ninety-one million, two hundred ninety-eight thousand, six hundred sixty-five".