5517115991 has 16 divisors (see below), whose sum is σ = 5932332000. Its totient is φ = 5120373888.

The previous prime is 5517115979. The next prime is 5517116023. The reversal of 5517115991 is 1995117155.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5517115991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5517115391) 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, 58085 + ... + 120033.

It is an arithmetic number, because the mean of its divisors is an integer number (370770750).

Almost surely, 2^5517115991 is an apocalyptic number.

5517115991 is a deficient number, since it is larger than the sum of its proper divisors (415216009).

5517115991 is a wasteful number, since it uses less digits than its factorization.

5517115991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62098.

The product of its digits is 70875, while the sum is 44.

The square root of 5517115991 is about 74277.2912201300. The cubic root of 5517115991 is about 1767.0033445485.

The spelling of 5517115991 in words is "five billion, five hundred seventeen million, one hundred fifteen thousand, nine hundred ninety-one".