1818161731654 has 8 divisors (see below), whose sum is σ = 2821285445760. Its totient is φ = 877733249736.

The previous prime is 1818161731627. The next prime is 1818161731697. The reversal of 1818161731654 is 4561371618181.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15673807974 + ... + 15673808089.

It is an arithmetic number, because the mean of its divisors is an integer number (352660680720).

Almost surely, 2^{1818161731654} is an apocalyptic number.

1818161731654 is a deficient number, since it is larger than the sum of its proper divisors (1003123714106).

1818161731654 is a wasteful number, since it uses less digits than its factorization.

1818161731654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31347616094.

The product of its digits is 967680, while the sum is 52.

The spelling of 1818161731654 in words is "one trillion, eight hundred eighteen billion, one hundred sixty-one million, seven hundred thirty-one thousand, six hundred fifty-four".