15251145641 has 4 divisors (see below), whose sum is σ = 15501164484. Its totient is φ = 15001126800.

The previous prime is 15251145599. The next prime is 15251145673. The reversal of 15251145641 is 14654115251.

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 7844822041 + 7406323600 = 88571^2 + 86060^2 .

It is a cyclic number.

It is not a de Polignac number, because 15251145641 - 2⁶ = 15251145577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15251165641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125009330 + ... + 125009451.

It is an arithmetic number, because the mean of its divisors is an integer number (3875291121).

Almost surely, 2^15251145641 is an apocalyptic number.

It is an amenable number.

15251145641 is a deficient number, since it is larger than the sum of its proper divisors (250018843).

15251145641 is an equidigital number, since it uses as much as digits as its factorization.

15251145641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250018842.

The product of its digits is 24000, while the sum is 35.

The spelling of 15251145641 in words is "fifteen billion, two hundred fifty-one million, one hundred forty-five thousand, six hundred forty-one".