64839163845455 has 32 divisors (see below), whose sum is σ = 78577500729600. Its totient is φ = 51359701155840.

The previous prime is 64839163845413. The next prime is 64839163845539. The reversal of 64839163845455 is 55454836193846.

It is not a de Polignac number, because 64839163845455 - 2⁴⁴ = 47246977801039 is a prime.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 897130970 + ... + 897203240.

It is an arithmetic number, because the mean of its divisors is an integer number (2455546897800).

Almost surely, 2^{64839163845455} is an apocalyptic number.

64839163845455 is a deficient number, since it is larger than the sum of its proper divisors (13738336884145).

64839163845455 is a wasteful number, since it uses less digits than its factorization.

64839163845455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75779.

The product of its digits is 1492992000, while the sum is 71.

The spelling of 64839163845455 in words is "sixty-four trillion, eight hundred thirty-nine billion, one hundred sixty-three million, eight hundred forty-five thousand, four hundred fifty-five".