125687255380 has 24 divisors (see below), whose sum is σ = 264079863432. Its totient is φ = 50248877952.

The previous prime is 125687255363. The next prime is 125687255387. The reversal of 125687255380 is 83552786521.

It can be written as a sum of positive squares in 4 ways, for example, as 36685273156 + 89001982224 = 191534^2 + 298332^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125687255387) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1586887 + ... + 1664206.

It is an arithmetic number, because the mean of its divisors is an integer number (11003327643).

Almost surely, 2^125687255380 is an apocalyptic number.

125687255380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125687255380 is an abundant number, since it is smaller than the sum of its proper divisors (138392608052).

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

125687255380 is a wasteful number, since it uses less digits than its factorization.

125687255380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3253035 (or 3253033 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 52.

The spelling of 125687255380 in words is "one hundred twenty-five billion, six hundred eighty-seven million, two hundred fifty-five thousand, three hundred eighty".