645379030 has 16 divisors (see below), whose sum is σ = 1168103664. Its totient is φ = 256724640.

The previous prime is 645379019. The next prime is 645379093. The reversal of 645379030 is 30973546.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176472 + ... + 180091.

It is an arithmetic number, because the mean of its divisors is an integer number (73006479).

Almost surely, 2^645379030 is an apocalyptic number.

645379030 is a deficient number, since it is larger than the sum of its proper divisors (522724634).

645379030 is a wasteful number, since it uses less digits than its factorization.

645379030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356751.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 645379030 is about 25404.3112482901. The cubic root of 645379030 is about 864.1814703341.

The spelling of 645379030 in words is "six hundred forty-five million, three hundred seventy-nine thousand, thirty".