125838452947091 has 2 divisors, whose sum is σ = 125838452947092. Its totient is φ = 125838452947090.

The previous prime is 125838452947021. The next prime is 125838452947093. The reversal of 125838452947091 is 190749254838521.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (190749254838521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125838452947091 is a prime.

Together with 125838452947093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125838452947093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62919226473545 + 62919226473546.

It is an arithmetic number, because the mean of its divisors is an integer number (62919226473546).

Almost surely, 2^{125838452947091} is an apocalyptic number.

125838452947091 is a deficient number, since it is larger than the sum of its proper divisors (1).

125838452947091 is an equidigital number, since it uses as much as digits as its factorization.

125838452947091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174182400, while the sum is 68.

The spelling of 125838452947091 in words is "one hundred twenty-five trillion, eight hundred thirty-eight billion, four hundred fifty-two million, nine hundred forty-seven thousand, ninety-one".