645451550033 has 8 divisors (see below), whose sum is σ = 695240941056. Its totient is φ = 597472682400.

The previous prime is 645451549937. The next prime is 645451550069. The reversal of 645451550033 is 330055154546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 645451550033 - 2²⁸ = 645183114577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645451550083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452630108 + ... + 452631533.

It is an arithmetic number, because the mean of its divisors is an integer number (86905117632).

Almost surely, 2^645451550033 is an apocalyptic number.

It is an amenable number.

645451550033 is a deficient number, since it is larger than the sum of its proper divisors (49789391023).

645451550033 is a wasteful number, since it uses less digits than its factorization.

645451550033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905261695.

The product of its (nonzero) digits is 540000, while the sum is 41.

The spelling of 645451550033 in words is "six hundred forty-five billion, four hundred fifty-one million, five hundred fifty thousand, thirty-three".