43018734478 has 4 divisors (see below), whose sum is σ = 64528101720. Its totient is φ = 21509367238.

The previous prime is 43018734449. The next prime is 43018734491. The reversal of 43018734478 is 87443781034.

It is a happy number.

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

It is a super-2 number, since 2×43018734478² (a number of 22 digits) contains 22 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, 10754683618 + ... + 10754683621.

It is an arithmetic number, because the mean of its divisors is an integer number (16132025430).

Almost surely, 2^43018734478 is an apocalyptic number.

43018734478 is a deficient number, since it is larger than the sum of its proper divisors (21509367242).

43018734478 is a wasteful number, since it uses less digits than its factorization.

43018734478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21509367241.

The product of its (nonzero) digits is 1806336, while the sum is 49.

The spelling of 43018734478 in words is "forty-three billion, eighteen million, seven hundred thirty-four thousand, four hundred seventy-eight".