64634444543 has 8 divisors (see below), whose sum is σ = 67447296000. Its totient is φ = 61821814648.

The previous prime is 64634444491. The next prime is 64634444561. The reversal of 64634444543 is 34544443646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64634444543 - 2²⁸ = 64366009087 is a prime.

It is a super-2 number, since 2×64634444543² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64634444143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 869558 + ... + 940956.

It is an arithmetic number, because the mean of its divisors is an integer number (8430912000).

Almost surely, 2^64634444543 is an apocalyptic number.

64634444543 is a deficient number, since it is larger than the sum of its proper divisors (2812851457).

64634444543 is a wasteful number, since it uses less digits than its factorization.

64634444543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110781.

The product of its digits is 6635520, while the sum is 47.

The spelling of 64634444543 in words is "sixty-four billion, six hundred thirty-four million, four hundred forty-four thousand, five hundred forty-three".