645110024423 has 2 divisors, whose sum is σ = 645110024424. Its totient is φ = 645110024422.

The previous prime is 645110024411. The next prime is 645110024509. The reversal of 645110024423 is 324420011546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645110024423 - 2¹⁰ = 645110023399 is a prime.

It is a super-2 number, since 2×645110024423² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 645110024423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645110024023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322555012211 + 322555012212.

It is an arithmetic number, because the mean of its divisors is an integer number (322555012212).

Almost surely, 2^645110024423 is an apocalyptic number.

645110024423 is a deficient number, since it is larger than the sum of its proper divisors (1).

645110024423 is an equidigital number, since it uses as much as digits as its factorization.

645110024423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 645110024423 its reverse (324420011546), we get a palindrome (969530035969).

The spelling of 645110024423 in words is "six hundred forty-five billion, one hundred ten million, twenty-four thousand, four hundred twenty-three".