125991064229 has 4 divisors (see below), whose sum is σ = 126120022284. Its totient is φ = 125862106176.

The previous prime is 125991064193. The next prime is 125991064237. The reversal of 125991064229 is 922460199521.

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 94636216900 + 31354847329 = 307630^2 + 177073^2 .

It is a cyclic number.

It is not a de Polignac number, because 125991064229 - 2¹² = 125991060133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125991064289) 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, 64477562 + ... + 64479515.

It is an arithmetic number, because the mean of its divisors is an integer number (31530005571).

Almost surely, 2^125991064229 is an apocalyptic number.

It is an amenable number.

125991064229 is a deficient number, since it is larger than the sum of its proper divisors (128958055).

125991064229 is an equidigital number, since it uses as much as digits as its factorization.

125991064229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128958054.

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 125991064229 in words is "one hundred twenty-five billion, nine hundred ninety-one million, sixty-four thousand, two hundred twenty-nine".