646786102 has 16 divisors (see below), whose sum is σ = 976089600. Its totient is φ = 321428520.

The previous prime is 646786093. The next prime is 646786109. The reversal of 646786102 is 201687646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646786109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352327 + ... + 354157.

It is an arithmetic number, because the mean of its divisors is an integer number (61005600).

Almost surely, 2^646786102 is an apocalyptic number.

646786102 is a deficient number, since it is larger than the sum of its proper divisors (329303498).

646786102 is a wasteful number, since it uses less digits than its factorization.

646786102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 646786102 is about 25431.9897373367. The cubic root of 646786102 is about 864.8090513726.

The spelling of 646786102 in words is "six hundred forty-six million, seven hundred eighty-six thousand, one hundred two".