125966974109 has 2 divisors, whose sum is σ = 125966974110. Its totient is φ = 125966974108.

The previous prime is 125966974033. The next prime is 125966974129. The reversal of 125966974109 is 901479669521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121397890084 + 4569084025 = 348422^2 + 67595^2 .

It is a cyclic number.

It is not a de Polignac number, because 125966974109 - 2²⁴ = 125950196893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125966974129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62983487054 + 62983487055.

It is an arithmetic number, because the mean of its divisors is an integer number (62983487055).

Almost surely, 2^125966974109 is an apocalyptic number.

It is an amenable number.

125966974109 is a deficient number, since it is larger than the sum of its proper divisors (1).

125966974109 is an equidigital number, since it uses as much as digits as its factorization.

125966974109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7348320, while the sum is 59.

The spelling of 125966974109 in words is "one hundred twenty-five billion, nine hundred sixty-six million, nine hundred seventy-four thousand, one hundred nine".