6434642784 has 24 divisors (see below), whose sum is σ = 16890937560. Its totient is φ = 2144880896.

The previous prime is 6434642759. The next prime is 6434642789. The reversal of 6434642784 is 4872464346.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6434642789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33513669 + ... + 33513860.

It is an arithmetic number, because the mean of its divisors is an integer number (703789065).

Almost surely, 2^6434642784 is an apocalyptic number.

It is an amenable number.

6434642784 is an abundant number, since it is smaller than the sum of its proper divisors (10456294776).

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

6434642784 is a wasteful number, since it uses less digits than its factorization.

6434642784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67027542 (or 67027534 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 48.

The square root of 6434642784 is about 80216.2251916656. The cubic root of 6434642784 is about 1859.9794563577.

The spelling of 6434642784 in words is "six billion, four hundred thirty-four million, six hundred forty-two thousand, seven hundred eighty-four".