645225038 has 16 divisors (see below), whose sum is σ = 1029981744. Its totient is φ = 302090880.

The previous prime is 645225023. The next prime is 645225043. The reversal of 645225038 is 830522546.

It is a junction number, because it is equal to n+sod(n) for n = 645224989 and 645225007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41468 + ... + 54863.

It is an arithmetic number, because the mean of its divisors is an integer number (64373859).

Almost surely, 2^645225038 is an apocalyptic number.

645225038 is a deficient number, since it is larger than the sum of its proper divisors (384756706).

645225038 is a wasteful number, since it uses less digits than its factorization.

645225038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96547.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 645225038 is about 25401.2802433263. The cubic root of 645225038 is about 864.1127315968.

The spelling of 645225038 in words is "six hundred forty-five million, two hundred twenty-five thousand, thirty-eight".