125356836091 has 2 divisors, whose sum is σ = 125356836092. Its totient is φ = 125356836090.

The previous prime is 125356836071. The next prime is 125356836107. The reversal of 125356836091 is 190638653521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125356836091 - 2²¹ = 125354738939 is a prime.

It is not a weakly prime, because it can be changed into another prime (125356836071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62678418045 + 62678418046.

It is an arithmetic number, because the mean of its divisors is an integer number (62678418046).

Almost surely, 2^125356836091 is an apocalyptic number.

125356836091 is a deficient number, since it is larger than the sum of its proper divisors (1).

125356836091 is an equidigital number, since it uses as much as digits as its factorization.

125356836091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 125356836091 in words is "one hundred twenty-five billion, three hundred fifty-six million, eight hundred thirty-six thousand, ninety-one".