18253440655 has 8 divisors (see below), whose sum is σ = 21906030384. Its totient is φ = 14601484800.

The previous prime is 18253440643. The next prime is 18253440661. The reversal of 18253440655 is 55604435281.

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

It is not a de Polignac number, because 18253440655 - 2²³ = 18245052047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92626 + ... + 212335.

It is an arithmetic number, because the mean of its divisors is an integer number (2738253798).

Almost surely, 2^18253440655 is an apocalyptic number.

18253440655 is a deficient number, since it is larger than the sum of its proper divisors (3652589729).

18253440655 is a wasteful number, since it uses less digits than its factorization.

18253440655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316937.

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 18253440655 in words is "eighteen billion, two hundred fifty-three million, four hundred forty thousand, six hundred fifty-five".