125378262657 has 12 divisors (see below), whose sum is σ = 191754990180. Its totient is φ = 78668713728.

The previous prime is 125378262649. The next prime is 125378262707. The reversal of 125378262657 is 756262873521.

125378262657 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 7 + 8 + 2 + 626 + 5 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 99779542641 + 25598720016 = 315879^2 + 159996^2 .

It is not a de Polignac number, because 125378262657 - 2³ = 125378262649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125378222657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 409732732 + ... + 409733037.

It is an arithmetic number, because the mean of its divisors is an integer number (15979582515).

Almost surely, 2^125378262657 is an apocalyptic number.

125378262657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

125378262657 is a deficient number, since it is larger than the sum of its proper divisors (66376727523).

125378262657 is a wasteful number, since it uses less digits than its factorization.

125378262657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819465792 (or 819465789 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 54.

The spelling of 125378262657 in words is "one hundred twenty-five billion, three hundred seventy-eight million, two hundred sixty-two thousand, six hundred fifty-seven".