64844550064 has 40 divisors (see below), whose sum is σ = 151141437440. Its totient is φ = 26327861568.

The previous prime is 64844550041. The next prime is 64844550079. The reversal of 64844550064 is 46005544846.

It is a junction number, because it is equal to n+sod(n) for n = 64844549996 and 64844550023.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15233904 + ... + 15238159.

It is an arithmetic number, because the mean of its divisors is an integer number (3778535936).

Almost surely, 2^64844550064 is an apocalyptic number.

It is an amenable number.

64844550064 is an abundant number, since it is smaller than the sum of its proper divisors (86296887376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64844550064 is a wasteful number, since it uses less digits than its factorization.

64844550064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30472097 (or 30472091 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 46.

The spelling of 64844550064 in words is "sixty-four billion, eight hundred forty-four million, five hundred fifty thousand, sixty-four".