10891372816 has 20 divisors (see below), whose sum is σ = 21114775552. Its totient is φ = 5442398496.

The previous prime is 10891372783. The next prime is 10891372859. The reversal of 10891372816 is 61827319801.

It is a happy number.

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, 178056 + ... + 231271.

Almost surely, 2^10891372816 is an apocalyptic number.

10891372816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

10891372816 is a deficient number, since it is larger than the sum of its proper divisors (10223402736).

10891372816 is a wasteful number, since it uses less digits than its factorization.

10891372816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410998 (or 410992 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 10891372816 in words is "ten billion, eight hundred ninety-one million, three hundred seventy-two thousand, eight hundred sixteen".