15601032253561 has 2 divisors, whose sum is σ = 15601032253562. Its totient is φ = 15601032253560.

The previous prime is 15601032253537. The next prime is 15601032253603. The reversal of 15601032253561 is 16535223010651.

It is a happy number.

15601032253561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13241367599161 + 2359664654400 = 3638869^2 + 1536120^2 .

It is a cyclic number.

It is not a de Polignac number, because 15601032253561 - 2¹⁵ = 15601032220793 is a prime.

It is a super-2 number, since 2×15601032253561² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15601032253531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7800516126780 + 7800516126781.

It is an arithmetic number, because the mean of its divisors is an integer number (7800516126781).

Almost surely, 2^{15601032253561} is an apocalyptic number.

It is an amenable number.

15601032253561 is a deficient number, since it is larger than the sum of its proper divisors (1).

15601032253561 is an equidigital number, since it uses as much as digits as its factorization.

15601032253561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 15601032253561 in words is "fifteen trillion, six hundred one billion, thirty-two million, two hundred fifty-three thousand, five hundred sixty-one".