1255438624447 has 4 divisors (see below), whose sum is σ = 1434786999376. Its totient is φ = 1076090249520.

The previous prime is 1255438624441. The next prime is 1255438624459. The reversal of 1255438624447 is 7444268345521.

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

It is a cyclic number.

It is not a de Polignac number, because 1255438624447 - 2¹⁵ = 1255438591679 is a prime.

It is a super-2 number, since 2×1255438624447² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255438624441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89674187454 + ... + 89674187467.

It is an arithmetic number, because the mean of its divisors is an integer number (358696749844).

Almost surely, 2^{1255438624447} is an apocalyptic number.

1255438624447 is a deficient number, since it is larger than the sum of its proper divisors (179348374929).

1255438624447 is an equidigital number, since it uses as much as digits as its factorization.

1255438624447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179348374928.

The product of its digits is 25804800, while the sum is 55.

The spelling of 1255438624447 in words is "one trillion, two hundred fifty-five billion, four hundred thirty-eight million, six hundred twenty-four thousand, four hundred forty-seven".