64424509469 has 2 divisors, whose sum is σ = 64424509470. Its totient is φ = 64424509468.

The previous prime is 64424509451. The next prime is 64424509507. The reversal of 64424509469 is 96490542446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41346342244 + 23078167225 = 203338^2 + 151915^2 .

It is a cyclic number.

It is not a de Polignac number, because 64424509469 - 2³² = 60129542173 is a prime.

It is a super-2 number, since 2×64424509469² (a number of 22 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 64424509469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64424503469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32212254734 + 32212254735.

It is an arithmetic number, because the mean of its divisors is an integer number (32212254735).

Almost surely, 2^64424509469 is an apocalyptic number.

It is an amenable number.

64424509469 is a deficient number, since it is larger than the sum of its proper divisors (1).

64424509469 is an equidigital number, since it uses as much as digits as its factorization.

64424509469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7464960, while the sum is 53.

The spelling of 64424509469 in words is "sixty-four billion, four hundred twenty-four million, five hundred nine thousand, four hundred sixty-nine".