125681668245 has 72 divisors (see below), whose sum is σ = 255411247104. Its totient is φ = 57001952448.

The previous prime is 125681668223. The next prime is 125681668249. The reversal of 125681668245 is 542866186521.

125681668245 is a `hidden beast` number, since 1 + 2 + 568 + 16 + 68 + 2 + 4 + 5 = 666.

It is not a de Polignac number, because 125681668245 - 2¹⁴ = 125681651861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125681668191 and 125681668200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125681668249) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 55632 + ... + 504438.

It is an arithmetic number, because the mean of its divisors is an integer number (3547378432).

Almost surely, 2^125681668245 is an apocalyptic number.

125681668245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125681668245 is an abundant number, since it is smaller than the sum of its proper divisors (129729578859).

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

125681668245 is a wasteful number, since it uses less digits than its factorization.

125681668245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448959 (or 448949 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 54.

The spelling of 125681668245 in words is "one hundred twenty-five billion, six hundred eighty-one million, six hundred sixty-eight thousand, two hundred forty-five".