125016506309 has 2 divisors, whose sum is σ = 125016506310. Its totient is φ = 125016506308.

The previous prime is 125016506297. The next prime is 125016506341. The reversal of 125016506309 is 903605610521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100677386209 + 24339120100 = 317297^2 + 156010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125016506309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125016506369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62508253154 + 62508253155.

It is an arithmetic number, because the mean of its divisors is an integer number (62508253155).

Almost surely, 2^125016506309 is an apocalyptic number.

It is an amenable number.

125016506309 is a deficient number, since it is larger than the sum of its proper divisors (1).

125016506309 is an equidigital number, since it uses as much as digits as its factorization.

125016506309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 38.

The spelling of 125016506309 in words is "one hundred twenty-five billion, sixteen million, five hundred six thousand, three hundred nine".