64435784416 has 48 divisors (see below), whose sum is σ = 128516347008. Its totient is φ = 31797500800.

The previous prime is 64435784411. The next prime is 64435784473. The reversal of 64435784416 is 61448753446.

It is a super-2 number, since 2×64435784416² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64435784411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2726571 + ... + 2750101.

It is an arithmetic number, because the mean of its divisors is an integer number (2677423896).

Almost surely, 2^64435784416 is an apocalyptic number.

It is an amenable number.

64435784416 is a deficient number, since it is larger than the sum of its proper divisors (64080562592).

64435784416 is a wasteful number, since it uses less digits than its factorization.

64435784416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24655 (or 24647 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 52.

The spelling of 64435784416 in words is "sixty-four billion, four hundred thirty-five million, seven hundred eighty-four thousand, four hundred sixteen".