1618887587459 has 4 divisors (see below), whose sum is σ = 1634017378104. Its totient is φ = 1603757796816.

The previous prime is 1618887587441. The next prime is 1618887587491. The reversal of 1618887587459 is 9547857888161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1618887587459 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 1618887587459.

It is not an unprimeable number, because it can be changed into a prime (1618887517459) 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, 7564895162 + ... + 7564895375.

It is an arithmetic number, because the mean of its divisors is an integer number (408504344526).

Almost surely, 2^{1618887587459} is an apocalyptic number.

1618887587459 is a deficient number, since it is larger than the sum of its proper divisors (15129790645).

1618887587459 is a wasteful number, since it uses less digits than its factorization.

1618887587459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15129790644.

The product of its digits is 1083801600, while the sum is 77.

The spelling of 1618887587459 in words is "one trillion, six hundred eighteen billion, eight hundred eighty-seven million, five hundred eighty-seven thousand, four hundred fifty-nine".