125644644 has 36 divisors (see below), whose sum is σ = 334319440. Its totient is φ = 39677040.

The previous prime is 125644633. The next prime is 125644657. The reversal of 125644644 is 446446521.

125644644 is a `hidden beast` number, since 1 + 2 + 5 + 6 + 4 + 4 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 125644599 and 125644608.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 91162 + ... + 92529.

Almost surely, 2^125644644 is an apocalyptic number.

It is an amenable number.

125644644 is an abundant number, since it is smaller than the sum of its proper divisors (208674796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125644644 is a wasteful number, since it uses less digits than its factorization.

125644644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183720 (or 183715 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 125644644 is about 11209.1321697980. The cubic root of 125644644 is about 500.8580519846.

The spelling of 125644644 in words is "one hundred twenty-five million, six hundred forty-four thousand, six hundred forty-four".