125661338039 has 2 divisors, whose sum is σ = 125661338040. Its totient is φ = 125661338038.

The previous prime is 125661337993. The next prime is 125661338041. The reversal of 125661338039 is 930833166521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125661338039 is a prime.

Together with 125661338041, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 125661337984 and 125661338002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125661338239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62830669019 + 62830669020.

It is an arithmetic number, because the mean of its divisors is an integer number (62830669020).

Almost surely, 2^125661338039 is an apocalyptic number.

125661338039 is a deficient number, since it is larger than the sum of its proper divisors (1).

125661338039 is an equidigital number, since it uses as much as digits as its factorization.

125661338039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 125661338039 in words is "one hundred twenty-five billion, six hundred sixty-one million, three hundred thirty-eight thousand, thirty-nine".