15250633661 has 2 divisors, whose sum is σ = 15250633662. Its totient is φ = 15250633660.

The previous prime is 15250633639. The next prime is 15250633669. The reversal of 15250633661 is 16633605251.

15250633661 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., 10687631161 + 4563002500 = 103381^2 + 67550^2 .

It is a cyclic number.

It is not a de Polignac number, because 15250633661 - 2¹⁰ = 15250632637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15250633669) 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, 7625316830 + 7625316831.

It is an arithmetic number, because the mean of its divisors is an integer number (7625316831).

Almost surely, 2^15250633661 is an apocalyptic number.

It is an amenable number.

15250633661 is a deficient number, since it is larger than the sum of its proper divisors (1).

15250633661 is an equidigital number, since it uses as much as digits as its factorization.

15250633661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 15250633661 in words is "fifteen billion, two hundred fifty million, six hundred thirty-three thousand, six hundred sixty-one".