15451242461 has 4 divisors (see below), whose sum is σ = 15454872924. Its totient is φ = 15447612000.

The previous prime is 15451242451. The next prime is 15451242463. The reversal of 15451242461 is 16424215451.

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 11082825625 + 4368416836 = 105275^2 + 66094^2 .

It is a cyclic number.

It is not a de Polignac number, because 15451242461 - 2¹⁰ = 15451241437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15451242463) 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, 1808840 + ... + 1817361.

It is an arithmetic number, because the mean of its divisors is an integer number (3863718231).

Almost surely, 2^15451242461 is an apocalyptic number.

It is an amenable number.

15451242461 is a deficient number, since it is larger than the sum of its proper divisors (3630463).

15451242461 is an equidigital number, since it uses as much as digits as its factorization.

15451242461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630462.

The product of its digits is 38400, while the sum is 35.

The spelling of 15451242461 in words is "fifteen billion, four hundred fifty-one million, two hundred forty-two thousand, four hundred sixty-one".