125882377661 has 2 divisors, whose sum is σ = 125882377662. Its totient is φ = 125882377660.

The previous prime is 125882377637. The next prime is 125882377669. The reversal of 125882377661 is 166773288521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66933451225 + 58948926436 = 258715^2 + 242794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125882377661 is a prime.

It is a super-3 number, since 3×125882377661³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125882377597 and 125882377606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125882377669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62941188830 + 62941188831.

It is an arithmetic number, because the mean of its divisors is an integer number (62941188831).

Almost surely, 2^125882377661 is an apocalyptic number.

It is an amenable number.

125882377661 is a deficient number, since it is larger than the sum of its proper divisors (1).

125882377661 is an equidigital number, since it uses as much as digits as its factorization.

125882377661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6773760, while the sum is 56.

The spelling of 125882377661 in words is "one hundred twenty-five billion, eight hundred eighty-two million, three hundred seventy-seven thousand, six hundred sixty-one".