125635268389 has 2 divisors, whose sum is σ = 125635268390. Its totient is φ = 125635268388.

The previous prime is 125635268377. The next prime is 125635268417. The reversal of 125635268389 is 983862536521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81037008900 + 44598259489 = 284670^2 + 211183^2 .

It is a cyclic number.

It is not a de Polignac number, because 125635268389 - 2⁷ = 125635268261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125635268359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62817634194 + 62817634195.

It is an arithmetic number, because the mean of its divisors is an integer number (62817634195).

Almost surely, 2^125635268389 is an apocalyptic number.

It is an amenable number.

125635268389 is a deficient number, since it is larger than the sum of its proper divisors (1).

125635268389 is an equidigital number, since it uses as much as digits as its factorization.

125635268389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18662400, while the sum is 58.

The spelling of 125635268389 in words is "one hundred twenty-five billion, six hundred thirty-five million, two hundred sixty-eight thousand, three hundred eighty-nine".