18134554561 has 8 divisors (see below), whose sum is σ = 19154879744. Its totient is φ = 17141438160.

The previous prime is 18134554553. The next prime is 18134554567. The reversal of 18134554561 is 16545543181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18134554561 - 2³ = 18134554553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18134554567) 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, 6800826 + ... + 6803491.

It is an arithmetic number, because the mean of its divisors is an integer number (2394359968).

Almost surely, 2^18134554561 is an apocalyptic number.

It is an amenable number.

18134554561 is a deficient number, since it is larger than the sum of its proper divisors (1020325183).

18134554561 is a wasteful number, since it uses less digits than its factorization.

18134554561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13604391.

The product of its digits is 288000, while the sum is 43.

The spelling of 18134554561 in words is "eighteen billion, one hundred thirty-four million, five hundred fifty-four thousand, five hundred sixty-one".