645852134583 has 10 divisors (see below), whose sum is σ = 964791460424. Its totient is φ = 430568089668.

The previous prime is 645852134479. The next prime is 645852134597. The reversal of 645852134583 is 385431258546.

645852134583 is a `hidden beast` number, since 6 + 4 + 5 + 8 + 5 + 21 + 34 + 583 = 666.

It is not a de Polignac number, because 645852134583 - 2²⁰ = 645851086007 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 (645852154583) 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, 3986741491 + ... + 3986741652.

Almost surely, 2^645852134583 is an apocalyptic number.

645852134583 is a deficient number, since it is larger than the sum of its proper divisors (318939325841).

645852134583 is an equidigital number, since it uses as much as digits as its factorization.

645852134583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7973483155 (or 7973483146 counting only the distinct ones).

The product of its digits is 13824000, while the sum is 54.

The spelling of 645852134583 in words is "six hundred forty-five billion, eight hundred fifty-two million, one hundred thirty-four thousand, five hundred eighty-three".