9615913607681 has 2 divisors, whose sum is σ = 9615913607682. Its totient is φ = 9615913607680.

The previous prime is 9615913607551. The next prime is 9615913607747. The reversal of 9615913607681 is 1867063195169.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9612387148225 + 3526459456 = 3100385^2 + 59384^2 .

It is a cyclic number.

It is not a de Polignac number, because 9615913607681 - 2¹⁰ = 9615913606657 is a prime.

It is a super-2 number, since 2×9615913607681² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9615913627681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4807956803840 + 4807956803841.

It is an arithmetic number, because the mean of its divisors is an integer number (4807956803841).

Almost surely, 2^{9615913607681} is an apocalyptic number.

It is an amenable number.

9615913607681 is a deficient number, since it is larger than the sum of its proper divisors (1).

9615913607681 is an equidigital number, since it uses as much as digits as its factorization.

9615913607681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14696640, while the sum is 62.

The spelling of 9615913607681 in words is "nine trillion, six hundred fifteen billion, nine hundred thirteen million, six hundred seven thousand, six hundred eighty-one".