1618733044459 has 4 divisors (see below), whose sum is σ = 1618735594504. Its totient is φ = 1618730494416.

The previous prime is 1618733044429. The next prime is 1618733044517. The reversal of 1618733044459 is 9544403378161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1618733044459 - 2⁵ = 1618733044427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1618733044429) 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, 512479 + ... + 1870855.

It is an arithmetic number, because the mean of its divisors is an integer number (404683898626).

Almost surely, 2^{1618733044459} is an apocalyptic number.

1618733044459 is a deficient number, since it is larger than the sum of its proper divisors (2550045).

1618733044459 is a wasteful number, since it uses less digits than its factorization.

1618733044459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550044.

The product of its (nonzero) digits is 8709120, while the sum is 55.

It can be divided in two parts, 16187 and 33044459, that added together give a triangular number (33060646 = T₈₁₃₁).

The spelling of 1618733044459 in words is "one trillion, six hundred eighteen billion, seven hundred thirty-three million, forty-four thousand, four hundred fifty-nine".