125299385989 has 4 divisors (see below), whose sum is σ = 132669938124. Its totient is φ = 117928833856.

The previous prime is 125299385969. The next prime is 125299386011. The reversal of 125299385989 is 989583992521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59528680225 + 65770705764 = 243985^2 + 256458^2 .

It is a cyclic number.

It is not a de Polignac number, because 125299385989 - 2⁵ = 125299385957 is a prime.

It is a super-2 number, since 2×125299385989² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125299385929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3685276042 + ... + 3685276075.

It is an arithmetic number, because the mean of its divisors is an integer number (33167484531).

Almost surely, 2^125299385989 is an apocalyptic number.

It is an amenable number.

125299385989 is a deficient number, since it is larger than the sum of its proper divisors (7370552135).

125299385989 is an equidigital number, since it uses as much as digits as its factorization.

125299385989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7370552134.

The product of its digits is 125971200, while the sum is 70.

The spelling of 125299385989 in words is "one hundred twenty-five billion, two hundred ninety-nine million, three hundred eighty-five thousand, nine hundred eighty-nine".