7117900561 has 4 divisors (see below), whose sum is σ = 7536600612. Its totient is φ = 6699200512.

The previous prime is 7117900549. The next prime is 7117900613. The reversal of 7117900561 is 1650097117.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6234681600 + 883218961 = 78960^2 + 29719^2 .

It is a cyclic number.

It is not a de Polignac number, because 7117900561 - 2²³ = 7109511953 is a prime.

It is a super-2 number, since 2×7117900561² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7117900561.

It is not an unprimeable number, because it can be changed into a prime (7117900501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209350000 + ... + 209350033.

It is an arithmetic number, because the mean of its divisors is an integer number (1884150153).

Almost surely, 2^7117900561 is an apocalyptic number.

It is an amenable number.

7117900561 is a deficient number, since it is larger than the sum of its proper divisors (418700051).

7117900561 is a wasteful number, since it uses less digits than its factorization.

7117900561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418700050.

The product of its (nonzero) digits is 13230, while the sum is 37.

The square root of 7117900561 is about 84367.6511525597. The cubic root of 7117900561 is about 1923.6112374799.

Adding to 7117900561 its reverse (1650097117), we get a palindrome (8767997678).

The spelling of 7117900561 in words is "seven billion, one hundred seventeen million, nine hundred thousand, five hundred sixty-one".