117561530077 has 2 divisors, whose sum is σ = 117561530078. Its totient is φ = 117561530076.

The previous prime is 117561530039. The next prime is 117561530147. The reversal of 117561530077 is 770035165711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99596416921 + 17965113156 = 315589^2 + 134034^2 .

It is a cyclic number.

It is not a de Polignac number, because 117561530077 - 2¹⁹ = 117561005789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117561530377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58780765038 + 58780765039.

It is an arithmetic number, because the mean of its divisors is an integer number (58780765039).

Almost surely, 2^117561530077 is an apocalyptic number.

It is an amenable number.

117561530077 is a deficient number, since it is larger than the sum of its proper divisors (1).

117561530077 is an equidigital number, since it uses as much as digits as its factorization.

117561530077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 154350, while the sum is 43.

Adding to 117561530077 its reverse (770035165711), we get a palindrome (887596695788).

The spelling of 117561530077 in words is "one hundred seventeen billion, five hundred sixty-one million, five hundred thirty thousand, seventy-seven".