125844478431 has 16 divisors (see below), whose sum is σ = 192075861504. Its totient is φ = 71793813024.

The previous prime is 125844478427. The next prime is 125844478471. The reversal of 125844478431 is 134874448521.

It is not a de Polignac number, because 125844478431 - 2² = 125844478427 is a prime.

It is a super-2 number, since 2×125844478431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125844478471) 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 15 ways as a sum of consecutive naturals, for example, 4875051 + ... + 4900796.

It is an arithmetic number, because the mean of its divisors is an integer number (12004741344).

Almost surely, 2^125844478431 is an apocalyptic number.

125844478431 is a deficient number, since it is larger than the sum of its proper divisors (66231383073).

125844478431 is an equidigital number, since it uses as much as digits as its factorization.

125844478431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9776470.

The product of its digits is 3440640, while the sum is 51.

The spelling of 125844478431 in words is "one hundred twenty-five billion, eight hundred forty-four million, four hundred seventy-eight thousand, four hundred thirty-one".