645386926 has 8 divisors (see below), whose sum is σ = 968717304. Its totient is φ = 322481160.

The previous prime is 645386921. The next prime is 645386953. The reversal of 645386926 is 629683546.

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

It is a self number, because there is not a number n which added to its sum of digits gives 645386926.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645386921) 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, 102325 + ... + 108448.

It is an arithmetic number, because the mean of its divisors is an integer number (121089663).

Almost surely, 2^645386926 is an apocalyptic number.

645386926 is a deficient number, since it is larger than the sum of its proper divisors (323330378).

645386926 is a wasteful number, since it uses less digits than its factorization.

645386926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212306.

The product of its digits is 1866240, while the sum is 49.

The square root of 645386926 is about 25404.4666545078. The cubic root of 645386926 is about 864.1849946450.

The spelling of 645386926 in words is "six hundred forty-five million, three hundred eighty-six thousand, nine hundred twenty-six".