6423734888728 has 8 divisors (see below), whose sum is σ = 12044502916380. Its totient is φ = 3211867444360.

The previous prime is 6423734888699. The next prime is 6423734888743. The reversal of 6423734888728 is 8278884373246.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×6423734888728² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401483430538 + ... + 401483430553.

Almost surely, 2^{6423734888728} is an apocalyptic number.

It is an amenable number.

6423734888728 is a deficient number, since it is larger than the sum of its proper divisors (5620768027652).

6423734888728 is a wasteful number, since it uses less digits than its factorization.

6423734888728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802966861097 (or 802966861093 counting only the distinct ones).

The product of its digits is 693633024, while the sum is 70.

The spelling of 6423734888728 in words is "six trillion, four hundred twenty-three billion, seven hundred thirty-four million, eight hundred eighty-eight thousand, seven hundred twenty-eight".