125548829881 has 2 divisors, whose sum is σ = 125548829882. Its totient is φ = 125548829880.

The previous prime is 125548829873. The next prime is 125548829899. The reversal of 125548829881 is 188928845521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66471152400 + 59077677481 = 257820^2 + 243059^2 .

It is a cyclic number.

It is not a de Polignac number, because 125548829881 - 2³ = 125548829873 is a prime.

It is a super-2 number, since 2×125548829881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125548839881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62774414940 + 62774414941.

It is an arithmetic number, because the mean of its divisors is an integer number (62774414941).

Almost surely, 2^125548829881 is an apocalyptic number.

It is an amenable number.

125548829881 is a deficient number, since it is larger than the sum of its proper divisors (1).

125548829881 is an equidigital number, since it uses as much as digits as its factorization.

125548829881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14745600, while the sum is 61.

The spelling of 125548829881 in words is "one hundred twenty-five billion, five hundred forty-eight million, eight hundred twenty-nine thousand, eight hundred eighty-one".