11451104991 has 12 divisors (see below), whose sum is σ = 16564925832. Its totient is φ = 7622789616.

The previous prime is 11451104983. The next prime is 11451104993. The reversal of 11451104991 is 19940115411.

11451104991 is a `hidden beast` number, since 1 + 14 + 511 + 0 + 49 + 91 = 666.

It is not a de Polignac number, because 11451104991 - 2³ = 11451104983 is a prime.

It is a super-2 number, since 2×11451104991² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11451104993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 933601 + ... + 945786.

It is an arithmetic number, because the mean of its divisors is an integer number (1380410486).

Almost surely, 2^11451104991 is an apocalyptic number.

11451104991 is a deficient number, since it is larger than the sum of its proper divisors (5113820841).

11451104991 is a wasteful number, since it uses less digits than its factorization.

11451104991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880070 (or 1880067 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The spelling of 11451104991 in words is "eleven billion, four hundred fifty-one million, one hundred four thousand, nine hundred ninety-one".