125949731898 has 8 divisors (see below), whose sum is σ = 251899463808. Its totient is φ = 41983243964.

The previous prime is 125949731879. The next prime is 125949731911. The reversal of 125949731898 is 898137949521.

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

125949731898 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10495810986 + ... + 10495810997.

It is an arithmetic number, because the mean of its divisors is an integer number (31487432976).

Almost surely, 2^125949731898 is an apocalyptic number.

125949731898 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125949731898 is a wasteful number, since it uses less digits than its factorization.

125949731898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20991621988.

The product of its digits is 39191040, while the sum is 66.

The spelling of 125949731898 in words is "one hundred twenty-five billion, nine hundred forty-nine million, seven hundred thirty-one thousand, eight hundred ninety-eight".