64859895434553 has 4 divisors (see below), whose sum is σ = 86479860579408. Its totient is φ = 43239930289700.

The previous prime is 64859895434531. The next prime is 64859895434591. The reversal of 64859895434553 is 35543459895846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64859895434553 - 2⁶ = 64859895434489 is a prime.

It is a super-2 number, since 2×64859895434553² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64859895434753) 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, 10809982572423 + ... + 10809982572428.

It is an arithmetic number, because the mean of its divisors is an integer number (21619965144852).

Almost surely, 2^{64859895434553} is an apocalyptic number.

It is an amenable number.

64859895434553 is a deficient number, since it is larger than the sum of its proper divisors (21619965144855).

64859895434553 is a wasteful number, since it uses less digits than its factorization.

64859895434553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21619965144854.

The product of its digits is 11197440000, while the sum is 78.

The spelling of 64859895434553 in words is "sixty-four trillion, eight hundred fifty-nine billion, eight hundred ninety-five million, four hundred thirty-four thousand, five hundred fifty-three".