18100550115506 has 16 divisors (see below), whose sum is σ = 27800626569408. Its totient is φ = 8833953181200.

The previous prime is 18100550115491. The next prime is 18100550115521. The reversal of 18100550115506 is 60551105500181.

It is an interprime number because it is at equal distance from previous prime (18100550115491) and next prime (18100550115521).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18100550115506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69516485 + ... + 69776376.

It is an arithmetic number, because the mean of its divisors is an integer number (1737539160588).

Almost surely, 2^{18100550115506} is an apocalyptic number.

18100550115506 is a deficient number, since it is larger than the sum of its proper divisors (9700076453902).

18100550115506 is a wasteful number, since it uses less digits than its factorization.

18100550115506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139294417.

The product of its (nonzero) digits is 30000, while the sum is 38.

Adding to 18100550115506 its reverse (60551105500181), we get a palindrome (78651655615687).

The spelling of 18100550115506 in words is "eighteen trillion, one hundred billion, five hundred fifty million, one hundred fifteen thousand, five hundred six".