43518854279491 has 4 divisors (see below), whose sum is σ = 43861522423552. Its totient is φ = 43176186135432.

The previous prime is 43518854279473. The next prime is 43518854279539. The reversal of 43518854279491 is 19497245881534.

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

It is a cyclic number.

It is not a de Polignac number, because 43518854279491 - 2⁷ = 43518854279363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43518854279491.

It is not an unprimeable number, because it can be changed into a prime (43518854279191) 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, 171334071840 + ... + 171334072093.

It is an arithmetic number, because the mean of its divisors is an integer number (10965380605888).

Almost surely, 2^{43518854279491} is an apocalyptic number.

43518854279491 is a deficient number, since it is larger than the sum of its proper divisors (342668144061).

43518854279491 is a wasteful number, since it uses less digits than its factorization.

43518854279491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342668144060.

The product of its digits is 348364800, while the sum is 70.

The spelling of 43518854279491 in words is "forty-three trillion, five hundred eighteen billion, eight hundred fifty-four million, two hundred seventy-nine thousand, four hundred ninety-one".