125542926881 has 2 divisors, whose sum is σ = 125542926882. Its totient is φ = 125542926880.

The previous prime is 125542926863. The next prime is 125542926917. The reversal of 125542926881 is 188629245521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89496107281 + 36046819600 = 299159^2 + 189860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125542926881 is a prime.

It is a super-2 number, since 2×125542926881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125542926781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62771463440 + 62771463441.

It is an arithmetic number, because the mean of its divisors is an integer number (62771463441).

Almost surely, 2^125542926881 is an apocalyptic number.

It is an amenable number.

125542926881 is a deficient number, since it is larger than the sum of its proper divisors (1).

125542926881 is an equidigital number, since it uses as much as digits as its factorization.

125542926881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2764800, while the sum is 53.

The spelling of 125542926881 in words is "one hundred twenty-five billion, five hundred forty-two million, nine hundred twenty-six thousand, eight hundred eighty-one".