645255050 has 24 divisors (see below), whose sum is σ = 1309282272. Its totient is φ = 234638000.

The previous prime is 645254993. The next prime is 645255053. The reversal of 645255050 is 50552546.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 645254998 and 645255016.

It is not an unprimeable number, because it can be changed into a prime (645255053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 586046 + ... + 587145.

It is an arithmetic number, because the mean of its divisors is an integer number (54553428).

Almost surely, 2^645255050 is an apocalyptic number.

645255050 is an abundant number, since it is smaller than the sum of its proper divisors (664027222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645255050 is a wasteful number, since it uses less digits than its factorization.

645255050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173214 (or 1173209 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 32.

The square root of 645255050 is about 25401.8709940823. The cubic root of 645255050 is about 864.1261291701.

The spelling of 645255050 in words is "six hundred forty-five million, two hundred fifty-five thousand, fifty".