125681681790 has 96 divisors (see below), whose sum is σ = 377953744896. Its totient is φ = 28381118400.

The previous prime is 125681681773. The next prime is 125681681837. The reversal of 125681681790 is 97186186521.

It is a happy number.

125681681790 is a `hidden beast` number, since 1 + 2 + 568 + 1 + 6 + 8 + 1 + 79 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1149486 + ... + 1254065.

It is an arithmetic number, because the mean of its divisors is an integer number (3937018176).

Almost surely, 2^125681681790 is an apocalyptic number.

125681681790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125681681790 is an abundant number, since it is smaller than the sum of its proper divisors (252272063106).

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

125681681790 is a wasteful number, since it uses less digits than its factorization.

125681681790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403654 (or 2403651 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The spelling of 125681681790 in words is "one hundred twenty-five billion, six hundred eighty-one million, six hundred eighty-one thousand, seven hundred ninety".