5456566109991 has 16 divisors (see below), whose sum is σ = 7412775199200. Its totient is φ = 3569035392000.

The previous prime is 5456566109989. The next prime is 5456566110077. The reversal of 5456566109991 is 1999016656545.

It is not a de Polignac number, because 5456566109991 - 2¹ = 5456566109989 is a prime.

It is a super-2 number, since 2×5456566109991² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5456566109921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24030991 + ... + 24256991.

It is an arithmetic number, because the mean of its divisors is an integer number (463298449950).

Almost surely, 2^{5456566109991} is an apocalyptic number.

5456566109991 is a deficient number, since it is larger than the sum of its proper divisors (1956209089209).

5456566109991 is a wasteful number, since it uses less digits than its factorization.

5456566109991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377906.

The product of its (nonzero) digits is 78732000, while the sum is 66.

The spelling of 5456566109991 in words is "five trillion, four hundred fifty-six billion, five hundred sixty-six million, one hundred nine thousand, nine hundred ninety-one".