645263230 has 8 divisors (see below), whose sum is σ = 1161473832. Its totient is φ = 258105288.

The previous prime is 645263219. The next prime is 645263243. The reversal of 645263230 is 32362546.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 645263192 and 645263201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32263152 + ... + 32263171.

It is an arithmetic number, because the mean of its divisors is an integer number (145184229).

Almost surely, 2^645263230 is an apocalyptic number.

645263230 is a deficient number, since it is larger than the sum of its proper divisors (516210602).

645263230 is a wasteful number, since it uses less digits than its factorization.

645263230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64526330.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 645263230 is about 25402.0320053337. The cubic root of 645263230 is about 864.1297807091.

The spelling of 645263230 in words is "six hundred forty-five million, two hundred sixty-three thousand, two hundred thirty".