646425134 has 4 divisors (see below), whose sum is σ = 969637704. Its totient is φ = 323212566.

The previous prime is 646425127. The next prime is 646425139. The reversal of 646425134 is 431524646.

646425134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 646425094 and 646425103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646425139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161606282 + ... + 161606285.

It is an arithmetic number, because the mean of its divisors is an integer number (242409426).

Almost surely, 2^646425134 is an apocalyptic number.

646425134 is a deficient number, since it is larger than the sum of its proper divisors (323212570).

646425134 is a wasteful number, since it uses less digits than its factorization.

646425134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323212569.

The product of its digits is 69120, while the sum is 35.

The square root of 646425134 is about 25424.8920155032. The cubic root of 646425134 is about 864.6481396049.

The spelling of 646425134 in words is "six hundred forty-six million, four hundred twenty-five thousand, one hundred thirty-four".