125454433109 has 2 divisors, whose sum is σ = 125454433110. Its totient is φ = 125454433108.

The previous prime is 125454433073. The next prime is 125454433123. The reversal of 125454433109 is 901334454521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114499670884 + 10954762225 = 338378^2 + 104665^2 .

It is an emirp because it is prime and its reverse (901334454521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125454433109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125454439109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62727216554 + 62727216555.

It is an arithmetic number, because the mean of its divisors is an integer number (62727216555).

Almost surely, 2^125454433109 is an apocalyptic number.

It is an amenable number.

125454433109 is a deficient number, since it is larger than the sum of its proper divisors (1).

125454433109 is an equidigital number, since it uses as much as digits as its factorization.

125454433109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 125454433109 in words is "one hundred twenty-five billion, four hundred fifty-four million, four hundred thirty-three thousand, one hundred nine".