43253281678 has 4 divisors (see below), whose sum is σ = 64879922520. Its totient is φ = 21626640838.

The previous prime is 43253281663. The next prime is 43253281697. The reversal of 43253281678 is 87618235234.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×43253281678³ (a number of 33 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10813320418 + ... + 10813320421.

It is an arithmetic number, because the mean of its divisors is an integer number (16219980630).

Almost surely, 2^43253281678 is an apocalyptic number.

43253281678 is a deficient number, since it is larger than the sum of its proper divisors (21626640842).

43253281678 is a wasteful number, since it uses less digits than its factorization.

43253281678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21626640841.

The product of its digits is 1935360, while the sum is 49.

The spelling of 43253281678 in words is "forty-three billion, two hundred fifty-three million, two hundred eighty-one thousand, six hundred seventy-eight".