125971981480 has 16 divisors (see below), whose sum is σ = 283436958420. Its totient is φ = 50388792576.

The previous prime is 125971981477. The next prime is 125971981507. The reversal of 125971981480 is 84189179521.

It can be written as a sum of positive squares in 2 ways, for example, as 106796932804 + 19175048676 = 326798^2 + 138474^2 .

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, 1574649729 + ... + 1574649808.

Almost surely, 2^125971981480 is an apocalyptic number.

125971981480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125971981480 is an abundant number, since it is smaller than the sum of its proper divisors (157464976940).

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

125971981480 is a wasteful number, since it uses less digits than its factorization.

125971981480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3149299548 (or 3149299544 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 55.

The spelling of 125971981480 in words is "one hundred twenty-five billion, nine hundred seventy-one million, nine hundred eighty-one thousand, four hundred eighty".