645433530 has 32 divisors (see below), whose sum is σ = 1770332544. Its totient is φ = 147527616.

The previous prime is 645433517. The next prime is 645433559. The reversal of 645433530 is 35334546.

It is a junction number, because it is equal to n+sod(n) for n = 645433491 and 645433500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1536537 + ... + 1536956.

It is an arithmetic number, because the mean of its divisors is an integer number (55322892).

Almost surely, 2^645433530 is an apocalyptic number.

645433530 is an abundant number, since it is smaller than the sum of its proper divisors (1124899014).

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

645433530 is a wasteful number, since it uses less digits than its factorization.

645433530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073510.

The product of its (nonzero) digits is 64800, while the sum is 33.

The square root of 645433530 is about 25405.3838782255. The cubic root of 645433530 is about 864.2057953495.

The spelling of 645433530 in words is "six hundred forty-five million, four hundred thirty-three thousand, five hundred thirty".