15125291261 has 2 divisors, whose sum is σ = 15125291262. Its totient is φ = 15125291260.

The previous prime is 15125291231. The next prime is 15125291287. The reversal of 15125291261 is 16219252151.

15125291261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12058236100 + 3067055161 = 109810^2 + 55381^2 .

It is a cyclic number.

It is not a de Polignac number, because 15125291261 - 2¹⁰ = 15125290237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15125291231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7562645630 + 7562645631.

It is an arithmetic number, because the mean of its divisors is an integer number (7562645631).

Almost surely, 2^15125291261 is an apocalyptic number.

It is an amenable number.

15125291261 is a deficient number, since it is larger than the sum of its proper divisors (1).

15125291261 is an equidigital number, since it uses as much as digits as its factorization.

15125291261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 35.

The spelling of 15125291261 in words is "fifteen billion, one hundred twenty-five million, two hundred ninety-one thousand, two hundred sixty-one".