645612206630 has 16 divisors (see below), whose sum is σ = 1162426374144. Its totient is φ = 258172793280.

The previous prime is 645612206587. The next prime is 645612206633. The reversal of 645612206630 is 36602216546.

It is a happy number.

645612206630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645612206633) 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, 8973551 + ... + 9045210.

It is an arithmetic number, because the mean of its divisors is an integer number (72651648384).

Almost surely, 2^645612206630 is an apocalyptic number.

645612206630 is a deficient number, since it is larger than the sum of its proper divisors (516814167514).

645612206630 is a wasteful number, since it uses less digits than its factorization.

645612206630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18022351.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 645612206630 in words is "six hundred forty-five billion, six hundred twelve million, two hundred six thousand, six hundred thirty".