646890125 has 16 divisors (see below), whose sum is σ = 922651392. Its totient is φ = 443581200.

The previous prime is 646890119. The next prime is 646890143. The reversal of 646890125 is 521098646.

It is a happy number.

It is not a de Polignac number, because 646890125 - 2⁸ = 646889869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368777 + ... + 370526.

It is an arithmetic number, because the mean of its divisors is an integer number (57665712).

Almost surely, 2^646890125 is an apocalyptic number.

It is an amenable number.

646890125 is a deficient number, since it is larger than the sum of its proper divisors (275761267).

646890125 is an equidigital number, since it uses as much as digits as its factorization.

646890125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739325 (or 739315 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 646890125 is about 25434.0347762599. The cubic root of 646890125 is about 864.8554114749.

The spelling of 646890125 in words is "six hundred forty-six million, eight hundred ninety thousand, one hundred twenty-five".