125919959549 has 8 divisors (see below), whose sum is σ = 130091436288. Its totient is φ = 121755329280.

The previous prime is 125919959533. The next prime is 125919959603. The reversal of 125919959549 is 945959919521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125919959549 - 2⁴ = 125919959533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125919956549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1674212 + ... + 1747805.

It is an arithmetic number, because the mean of its divisors is an integer number (16261429536).

Almost surely, 2^125919959549 is an apocalyptic number.

It is an amenable number.

125919959549 is a deficient number, since it is larger than the sum of its proper divisors (4171476739).

125919959549 is a wasteful number, since it uses less digits than its factorization.

125919959549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3423235.

The product of its digits is 59049000, while the sum is 68.

The spelling of 125919959549 in words is "one hundred twenty-five billion, nine hundred nineteen million, nine hundred fifty-nine thousand, five hundred forty-nine".