125756577889 has 2 divisors, whose sum is σ = 125756577890. Its totient is φ = 125756577888.

The previous prime is 125756577871. The next prime is 125756577899. The reversal of 125756577889 is 988775657521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78502513489 + 47254064400 = 280183^2 + 217380^2 .

It is a cyclic number.

It is not a de Polignac number, because 125756577889 - 2⁵ = 125756577857 is a prime.

It is not a weakly prime, because it can be changed into another prime (125756577899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62878288944 + 62878288945.

It is an arithmetic number, because the mean of its divisors is an integer number (62878288945).

Almost surely, 2^125756577889 is an apocalyptic number.

It is an amenable number.

125756577889 is a deficient number, since it is larger than the sum of its proper divisors (1).

125756577889 is an equidigital number, since it uses as much as digits as its factorization.

125756577889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352000, while the sum is 70.

The spelling of 125756577889 in words is "one hundred twenty-five billion, seven hundred fifty-six million, five hundred seventy-seven thousand, eight hundred eighty-nine".