15256565414381 has 2 divisors, whose sum is σ = 15256565414382. Its totient is φ = 15256565414380.

The previous prime is 15256565414287. The next prime is 15256565414417. The reversal of 15256565414381 is 18341456565251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7632284750281 + 7624280664100 = 2762659^2 + 2761210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15256565414381 is a prime.

It is a super-2 number, since 2×15256565414381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15256565414281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7628282707190 + 7628282707191.

It is an arithmetic number, because the mean of its divisors is an integer number (7628282707191).

Almost surely, 2^{15256565414381} is an apocalyptic number.

It is an amenable number.

15256565414381 is a deficient number, since it is larger than the sum of its proper divisors (1).

15256565414381 is an equidigital number, since it uses as much as digits as its factorization.

15256565414381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280000, while the sum is 56.

The spelling of 15256565414381 in words is "fifteen trillion, two hundred fifty-six billion, five hundred sixty-five million, four hundred fourteen thousand, three hundred eighty-one".