64509126369 has 16 divisors (see below), whose sum is σ = 86503859904. Its totient is φ = 42760900800.

The previous prime is 64509126359. The next prime is 64509126389. The reversal of 64509126369 is 96362190546.

It is not a de Polignac number, because 64509126369 - 2¹⁷ = 64508995297 is a prime.

It is a super-2 number, since 2×64509126369² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64509126359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308979 + ... + 473799.

It is an arithmetic number, because the mean of its divisors is an integer number (5406491244).

Almost surely, 2^64509126369 is an apocalyptic number.

It is an amenable number.

64509126369 is a deficient number, since it is larger than the sum of its proper divisors (21994733535).

64509126369 is a wasteful number, since it uses less digits than its factorization.

64509126369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165568.

The product of its (nonzero) digits is 2099520, while the sum is 51.

The spelling of 64509126369 in words is "sixty-four billion, five hundred nine million, one hundred twenty-six thousand, three hundred sixty-nine".