15365736165961 has 2 divisors, whose sum is σ = 15365736165962. Its totient is φ = 15365736165960.

The previous prime is 15365736165959. The next prime is 15365736166003. The reversal of 15365736165961 is 16956163756351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8507722240000 + 6858013925961 = 2916800^2 + 2618781^2 .

It is a cyclic number.

It is not a de Polignac number, because 15365736165961 - 2¹ = 15365736165959 is a prime.

It is a super-2 number, since 2×15365736165961² (a number of 27 digits) contains 22 as substring.

Together with 15365736165959, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 15365736165893 and 15365736165902.

It is not a weakly prime, because it can be changed into another prime (15365736105961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7682868082980 + 7682868082981.

It is an arithmetic number, because the mean of its divisors is an integer number (7682868082981).

Almost surely, 2^{15365736165961} is an apocalyptic number.

It is an amenable number.

15365736165961 is a deficient number, since it is larger than the sum of its proper divisors (1).

15365736165961 is an equidigital number, since it uses as much as digits as its factorization.

15365736165961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91854000, while the sum is 64.

The spelling of 15365736165961 in words is "fifteen trillion, three hundred sixty-five billion, seven hundred thirty-six million, one hundred sixty-five thousand, nine hundred sixty-one".