64134832409 has 4 divisors (see below), whose sum is σ = 64353722916. Its totient is φ = 63915941904.

The previous prime is 64134832403. The next prime is 64134832459. The reversal of 64134832409 is 90423843146.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46546768009 + 17588064400 = 215747^2 + 132620^2 .

It is a cyclic number.

It is not a de Polignac number, because 64134832409 - 2⁴ = 64134832393 is a prime.

It is a super-2 number, since 2×64134832409² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64134832409.

It is not an unprimeable number, because it can be changed into a prime (64134832403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109444814 + ... + 109445399.

It is an arithmetic number, because the mean of its divisors is an integer number (16088430729).

Almost surely, 2^64134832409 is an apocalyptic number.

It is an amenable number.

64134832409 is a deficient number, since it is larger than the sum of its proper divisors (218890507).

64134832409 is a wasteful number, since it uses less digits than its factorization.

64134832409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218890506.

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 64134832409 in words is "sixty-four billion, one hundred thirty-four million, eight hundred thirty-two thousand, four hundred nine".