7117117105561 has 16 divisors (see below), whose sum is σ = 7559902022400. Its totient is φ = 6681417321600.

The previous prime is 7117117105559. The next prime is 7117117105573. The reversal of 7117117105561 is 1655017117117.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7117117105561 - 2¹ = 7117117105559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7117117105531) 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, 2716081 + ... + 4648798.

It is an arithmetic number, because the mean of its divisors is an integer number (472493876400).

Almost surely, 2^{7117117105561} is an apocalyptic number.

It is an amenable number.

7117117105561 is a deficient number, since it is larger than the sum of its proper divisors (442784916839).

7117117105561 is a wasteful number, since it uses less digits than its factorization.

7117117105561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7365360.

The product of its (nonzero) digits is 51450, while the sum is 43.

The spelling of 7117117105561 in words is "seven trillion, one hundred seventeen billion, one hundred seventeen million, one hundred five thousand, five hundred sixty-one".