64653112047784 has 128 divisors (see below), whose sum is σ = 137715959808000. Its totient is φ = 28208647643904.

The previous prime is 64653112047781. The next prime is 64653112047787. The reversal of 64653112047784 is 48774021135646.

It is an interprime number because it is at equal distance from previous prime (64653112047781) and next prime (64653112047787).

It is not an unprimeable number, because it can be changed into a prime (64653112047781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4235929737 + ... + 4235944999.

It is an arithmetic number, because the mean of its divisors is an integer number (1075905936000).

Almost surely, 2^{64653112047784} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64653112047784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68857979904000).

64653112047784 is an abundant number, since it is smaller than the sum of its proper divisors (73062847760216).

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

64653112047784 is a wasteful number, since it uses less digits than its factorization.

64653112047784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19767 (or 19763 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 58.

The spelling of 64653112047784 in words is "sixty-four trillion, six hundred fifty-three billion, one hundred twelve million, forty-seven thousand, seven hundred eighty-four".