645001412 has 48 divisors (see below), whose sum is σ = 1277640000. Its totient is φ = 282226560.

The previous prime is 645001411. The next prime is 645001433. The reversal of 645001412 is 214100546.

It is not an unprimeable number, because it can be changed into a prime (645001411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636218 + ... + 637230.

It is an arithmetic number, because the mean of its divisors is an integer number (26617500).

Almost surely, 2^645001412 is an apocalyptic number.

It is an amenable number.

645001412 is a deficient number, since it is larger than the sum of its proper divisors (632638588).

645001412 is a wasteful number, since it uses less digits than its factorization.

645001412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556 (or 1554 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 645001412 is about 25396.8779971082. The cubic root of 645001412 is about 864.0128902541.

Adding to 645001412 its reverse (214100546), we get a palindrome (859101958).

The spelling of 645001412 in words is "six hundred forty-five million, one thousand, four hundred twelve".