15250622561 has 4 divisors (see below), whose sum is σ = 15407845572. Its totient is φ = 15093399552.

The previous prime is 15250622537. The next prime is 15250622567. The reversal of 15250622561 is 16522605251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7741360225 + 7509262336 = 87985^2 + 86656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15250622561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15250622567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78611360 + ... + 78611553.

It is an arithmetic number, because the mean of its divisors is an integer number (3851961393).

Almost surely, 2^15250622561 is an apocalyptic number.

It is an amenable number.

15250622561 is a deficient number, since it is larger than the sum of its proper divisors (157223011).

15250622561 is an equidigital number, since it uses as much as digits as its factorization.

15250622561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157223010.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 15250622561 in words is "fifteen billion, two hundred fifty million, six hundred twenty-two thousand, five hundred sixty-one".