125626044545 has 4 divisors (see below), whose sum is σ = 150751253460. Its totient is φ = 100500835632.

The previous prime is 125626044541. The next prime is 125626044553. The reversal of 125626044545 is 545440626521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545440626521 = 7 ⋅77920089503.

It can be written as a sum of positive squares in 2 ways, for example, as 32471679601 + 93154364944 = 180199^2 + 305212^2 .

It is a cyclic number.

It is not a de Polignac number, because 125626044545 - 2² = 125626044541 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 125626044496 and 125626044505.

It is not an unprimeable number, because it can be changed into a prime (125626044541) 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, 12562604450 + ... + 12562604459.

It is an arithmetic number, because the mean of its divisors is an integer number (37687813365).

Almost surely, 2^125626044545 is an apocalyptic number.

It is an amenable number.

125626044545 is a deficient number, since it is larger than the sum of its proper divisors (25125208915).

125626044545 is an equidigital number, since it uses as much as digits as its factorization.

125626044545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25125208914.

The product of its (nonzero) digits is 1152000, while the sum is 44.

The spelling of 125626044545 in words is "one hundred twenty-five billion, six hundred twenty-six million, forty-four thousand, five hundred forty-five".