15451560449855 has 4 divisors (see below), whose sum is σ = 18541872539832. Its totient is φ = 12361248359880.

The previous prime is 15451560449803. The next prime is 15451560449867. The reversal of 15451560449855 is 55894406515451.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-15451560449855 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1545156044981 + ... + 1545156044990.

It is an arithmetic number, because the mean of its divisors is an integer number (4635468134958).

Almost surely, 2^{15451560449855} is an apocalyptic number.

15451560449855 is a deficient number, since it is larger than the sum of its proper divisors (3090312089977).

15451560449855 is an equidigital number, since it uses as much as digits as its factorization.

15451560449855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090312089976.

The product of its (nonzero) digits is 86400000, while the sum is 62.

The spelling of 15451560449855 in words is "fifteen trillion, four hundred fifty-one billion, five hundred sixty million, four hundred forty-nine thousand, eight hundred fifty-five".