64843397563 has 8 divisors (see below), whose sum is σ = 74156790240. Its totient is φ = 55542517440.

The previous prime is 64843397561. The next prime is 64843397587. The reversal of 64843397563 is 36579334846.

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 64843397563 - 2¹ = 64843397561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64843397498 and 64843397507.

It is not an unprimeable number, because it can be changed into a prime (64843397561) 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, 3117028 + ... + 3137761.

It is an arithmetic number, because the mean of its divisors is an integer number (9269598780).

Almost surely, 2^64843397563 is an apocalyptic number.

64843397563 is a deficient number, since it is larger than the sum of its proper divisors (9313392677).

64843397563 is a wasteful number, since it uses less digits than its factorization.

64843397563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6256277.

The product of its digits is 39191040, while the sum is 58.

The spelling of 64843397563 in words is "sixty-four billion, eight hundred forty-three million, three hundred ninety-seven thousand, five hundred sixty-three".