125544491519 has 16 divisors (see below), whose sum is σ = 131605758720. Its totient is φ = 119534131200.

The previous prime is 125544491459. The next prime is 125544491533. The reversal of 125544491519 is 915194445521.

It is a cyclic number.

It is not a de Polignac number, because 125544491519 - 2⁸ = 125544491263 is a prime.

It is a super-2 number, since 2×125544491519² (a number of 23 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 (125544491419) 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, 9326744 + ... + 9340194.

It is an arithmetic number, because the mean of its divisors is an integer number (8225359920).

Almost surely, 2^125544491519 is an apocalyptic number.

125544491519 is a deficient number, since it is larger than the sum of its proper divisors (6061267201).

125544491519 is a wasteful number, since it uses less digits than its factorization.

125544491519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15310.

The product of its digits is 1296000, while the sum is 50.

The spelling of 125544491519 in words is "one hundred twenty-five billion, five hundred forty-four million, four hundred ninety-one thousand, five hundred nineteen".