125638771663 has 8 divisors (see below), whose sum is σ = 125754028416. Its totient is φ = 125523571800.

The previous prime is 125638771627. The next prime is 125638771669. The reversal of 125638771663 is 366177836521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125638771663 - 2²¹ = 125636674511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125638771669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5260158 + ... + 5283988.

It is an arithmetic number, because the mean of its divisors is an integer number (15719253552).

Almost surely, 2^125638771663 is an apocalyptic number.

125638771663 is a deficient number, since it is larger than the sum of its proper divisors (115256753).

125638771663 is a wasteful number, since it uses less digits than its factorization.

125638771663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28445.

The product of its digits is 7620480, while the sum is 55.

The spelling of 125638771663 in words is "one hundred twenty-five billion, six hundred thirty-eight million, seven hundred seventy-one thousand, six hundred sixty-three".