645001024 has 14 divisors (see below), whose sum is σ = 1279924034. Its totient is φ = 322500480.

The previous prime is 645001009. The next prime is 645001033. The reversal of 645001024 is 420100546.

645001024 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 643129600 + 1871424 = 25360^2 + 1368^2 .

It is a super-2 number, since 2×645001024² = 832052641922097152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645000986 and 645001004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5039007 + ... + 5039134.

Almost surely, 2^645001024 is an apocalyptic number.

645001024 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

645001024 is a deficient number, since it is larger than the sum of its proper divisors (634923010).

645001024 is a wasteful number, since it uses less digits than its factorization.

645001024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10078153 (or 10078143 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 645001024 is about 25396.8703583729. The cubic root of 645001024 is about 864.0127170053.

The spelling of 645001024 in words is "six hundred forty-five million, one thousand, twenty-four".