125957931543 has 12 divisors (see below), whose sum is σ = 181993930560. Its totient is φ = 83946710016.

The previous prime is 125957931497. The next prime is 125957931571. The reversal of 125957931543 is 345139759521.

It is a happy number.

125957931543 is a `hidden beast` number, since 1 + 2 + 5 + 9 + 5 + 7 + 93 + 1 + 543 = 666.

It is not a de Polignac number, because 125957931543 - 2²¹ = 125955834391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125957931543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125957971543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2072071 + ... + 2131992.

It is an arithmetic number, because the mean of its divisors is an integer number (15166160880).

Almost surely, 2^125957931543 is an apocalyptic number.

125957931543 is a deficient number, since it is larger than the sum of its proper divisors (56035999017).

125957931543 is a wasteful number, since it uses less digits than its factorization.

125957931543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4207398 (or 4207395 counting only the distinct ones).

The product of its digits is 5103000, while the sum is 54.

The spelling of 125957931543 in words is "one hundred twenty-five billion, nine hundred fifty-seven million, nine hundred thirty-one thousand, five hundred forty-three".