645852134479 has 2 divisors, whose sum is σ = 645852134480. Its totient is φ = 645852134478.

The previous prime is 645852134471. The next prime is 645852134597. The reversal of 645852134479 is 974431258546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645852134479 - 2³ = 645852134471 is a prime.

It is a super-2 number, since 2×645852134479² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645852134471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322926067239 + 322926067240.

It is an arithmetic number, because the mean of its divisors is an integer number (322926067240).

Almost surely, 2^645852134479 is an apocalyptic number.

645852134479 is a deficient number, since it is larger than the sum of its proper divisors (1).

645852134479 is an equidigital number, since it uses as much as digits as its factorization.

645852134479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29030400, while the sum is 58.

The spelling of 645852134479 in words is "six hundred forty-five billion, eight hundred fifty-two million, one hundred thirty-four thousand, four hundred seventy-nine".