43041012818 has 4 divisors (see below), whose sum is σ = 64561519230. Its totient is φ = 21520506408.

The previous prime is 43041012787. The next prime is 43041012821. The reversal of 43041012818 is 81821014034.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 35305282609 + 7735730209 = 187897^2 + 87953^2 .

It is a super-2 number, since 2×43041012818² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10760253203 + ... + 10760253206.

Almost surely, 2^43041012818 is an apocalyptic number.

43041012818 is a deficient number, since it is larger than the sum of its proper divisors (21520506412).

43041012818 is a wasteful number, since it uses less digits than its factorization.

43041012818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21520506411.

The product of its (nonzero) digits is 6144, while the sum is 32.

The spelling of 43041012818 in words is "forty-three billion, forty-one million, twelve thousand, eight hundred eighteen".