646627694 has 8 divisors (see below), whose sum is σ = 985842408. Its totient is φ = 318013560.

The previous prime is 646627693. The next prime is 646627721. The reversal of 646627694 is 496726646.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646627693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2649992 + ... + 2650235.

It is an arithmetic number, because the mean of its divisors is an integer number (123230301).

Almost surely, 2^646627694 is an apocalyptic number.

646627694 is a deficient number, since it is larger than the sum of its proper divisors (339214714).

646627694 is a wasteful number, since it uses less digits than its factorization.

646627694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5300290.

The product of its digits is 2612736, while the sum is 50.

The square root of 646627694 is about 25428.8752012353. The cubic root of 646627694 is about 864.7384438682.

The spelling of 646627694 in words is "six hundred forty-six million, six hundred twenty-seven thousand, six hundred ninety-four".