18112136551 has 4 divisors (see below), whose sum is σ = 18113596072. Its totient is φ = 18110677032.

The previous prime is 18112136543. The next prime is 18112136591. The reversal of 18112136551 is 15563121181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15563121181 = 277 ⋅56184553.

It is a cyclic number.

It is not a de Polignac number, because 18112136551 - 2³ = 18112136543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18112136521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 710985 + ... + 736018.

It is an arithmetic number, because the mean of its divisors is an integer number (4528399018).

Almost surely, 2^18112136551 is an apocalyptic number.

18112136551 is a deficient number, since it is larger than the sum of its proper divisors (1459521).

18112136551 is a wasteful number, since it uses less digits than its factorization.

18112136551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459520.

The product of its digits is 7200, while the sum is 34.

The spelling of 18112136551 in words is "eighteen billion, one hundred twelve million, one hundred thirty-six thousand, five hundred fifty-one".