5517990837891 has 32 divisors (see below), whose sum is σ = 9343690752000. Its totient is φ = 3152779614720.

The previous prime is 5517990837883. The next prime is 5517990837913. The reversal of 5517990837891 is 1987380997155.

5517990837891 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5517990837891 - 2³ = 5517990837883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5517990837841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16035 + ... + 3322083.

It is an arithmetic number, because the mean of its divisors is an integer number (291990336000).

Almost surely, 2^{5517990837891} is an apocalyptic number.

5517990837891 is a deficient number, since it is larger than the sum of its proper divisors (3825699914109).

5517990837891 is a wasteful number, since it uses less digits than its factorization.

5517990837891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3314896 (or 3314890 counting only the distinct ones).

The product of its (nonzero) digits is 171460800, while the sum is 72.

The spelling of 5517990837891 in words is "five trillion, five hundred seventeen billion, nine hundred ninety million, eight hundred thirty-seven thousand, eight hundred ninety-one".