18868316401558 has 16 divisors (see below), whose sum is σ = 30485159381376. Its totient is φ = 8706861910080.

The previous prime is 18868316401553. The next prime is 18868316401601. The reversal of 18868316401558 is 85510461386881.

It is a self number, because there is not a number n which added to its sum of digits gives 18868316401558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18868316401553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66180591 + ... + 66465082.

It is an arithmetic number, because the mean of its divisors is an integer number (1905322461336).

Almost surely, 2^{18868316401558} is an apocalyptic number.

18868316401558 is a deficient number, since it is larger than the sum of its proper divisors (11616842979818).

18868316401558 is a wasteful number, since it uses less digits than its factorization.

18868316401558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132651159.

The product of its (nonzero) digits is 44236800, while the sum is 64.

The spelling of 18868316401558 in words is "eighteen trillion, eight hundred sixty-eight billion, three hundred sixteen million, four hundred one thousand, five hundred fifty-eight".