645533962 has 16 divisors (see below), whose sum is σ = 1069837632. Its totient is φ = 290572480.

The previous prime is 645533951. The next prime is 645533983. The reversal of 645533962 is 269335546.

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, 411964 + ... + 413527.

It is an arithmetic number, because the mean of its divisors is an integer number (66864852).

Almost surely, 2^645533962 is an apocalyptic number.

645533962 is a deficient number, since it is larger than the sum of its proper divisors (424303670).

645533962 is a wasteful number, since it uses less digits than its factorization.

645533962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825533.

The product of its digits is 583200, while the sum is 43.

The square root of 645533962 is about 25407.3603902491. The cubic root of 645533962 is about 864.2506176335.

The spelling of 645533962 in words is "six hundred forty-five million, five hundred thirty-three thousand, nine hundred sixty-two".