15881228706241 has 2 divisors, whose sum is σ = 15881228706242. Its totient is φ = 15881228706240.

The previous prime is 15881228706097. The next prime is 15881228706251. The reversal of 15881228706241 is 14260782218851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14311542963600 + 1569685742641 = 3783060^2 + 1252871^2 .

It is a cyclic number.

It is not a de Polignac number, because 15881228706241 - 2¹⁹ = 15881228181953 is a prime.

It is not a weakly prime, because it can be changed into another prime (15881228706251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7940614353120 + 7940614353121.

It is an arithmetic number, because the mean of its divisors is an integer number (7940614353121).

Almost surely, 2^{15881228706241} is an apocalyptic number.

It is an amenable number.

15881228706241 is a deficient number, since it is larger than the sum of its proper divisors (1).

15881228706241 is an equidigital number, since it uses as much as digits as its factorization.

15881228706241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3440640, while the sum is 55.

The spelling of 15881228706241 in words is "fifteen trillion, eight hundred eighty-one billion, two hundred twenty-eight million, seven hundred six thousand, two hundred forty-one".