64749547359089 has 16 divisors (see below), whose sum is σ = 66606120203328. Its totient is φ = 62916815587392.

The previous prime is 64749547359061. The next prime is 64749547359097. The reversal of 64749547359089 is 98095374594746.

It is not a de Polignac number, because 64749547359089 - 2²⁸ = 64749278923633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64749547359989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19055774 + ... + 22195080.

It is an arithmetic number, because the mean of its divisors is an integer number (4162882512708).

Almost surely, 2^{64749547359089} is an apocalyptic number.

It is an amenable number.

64749547359089 is a deficient number, since it is larger than the sum of its proper divisors (1856572844239).

64749547359089 is a wasteful number, since it uses less digits than its factorization.

64749547359089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143104.

The product of its (nonzero) digits is 8230118400, while the sum is 80.

The spelling of 64749547359089 in words is "sixty-four trillion, seven hundred forty-nine billion, five hundred forty-seven million, three hundred fifty-nine thousand, eighty-nine".