645233476 has 12 divisors (see below), whose sum is σ = 1130734080. Its totient is φ = 322166600.

The previous prime is 645233471. The next prime is 645233489. The reversal of 645233476 is 674332546.

It is not an unprimeable number, because it can be changed into a prime (645233471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109300 + ... + 115051.

It is an arithmetic number, because the mean of its divisors is an integer number (94227840).

Almost surely, 2^645233476 is an apocalyptic number.

It is an amenable number.

645233476 is a deficient number, since it is larger than the sum of its proper divisors (485500604).

645233476 is a wasteful number, since it uses less digits than its factorization.

645233476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225074 (or 225072 counting only the distinct ones).

The product of its digits is 362880, while the sum is 40.

The square root of 645233476 is about 25401.4463367738. The cubic root of 645233476 is about 864.1164984229.

The spelling of 645233476 in words is "six hundred forty-five million, two hundred thirty-three thousand, four hundred seventy-six".