645000232021263 has 10 divisors (see below), whose sum is σ = 963518865118304. Its totient is φ = 430000154680788.

The previous prime is 645000232021241. The next prime is 645000232021279. The reversal of 645000232021263 is 362120232000546.

645000232021263 is a `hidden beast` number, since 6 + 4 + 50 + 0 + 0 + 2 + 320 + 21 + 263 = 666.

It is not a de Polignac number, because 645000232021263 - 2⁵ = 645000232021231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645000232021063) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3981482913631 + ... + 3981482913792.

Almost surely, 2^{645000232021263} is an apocalyptic number.

645000232021263 is a deficient number, since it is larger than the sum of its proper divisors (318518633097041).

645000232021263 is an equidigital number, since it uses as much as digits as its factorization.

645000232021263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7962965827435 (or 7962965827426 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 645000232021263 in words is "six hundred forty-five trillion, two hundred thirty-two million, twenty-one thousand, two hundred sixty-three".