18653657344144 has 45 divisors (see below), whose sum is σ = 36584958931833. Its totient is φ = 9213748928256.

The previous prime is 18653657344129. The next prime is 18653657344151. The reversal of 18653657344144 is 44144375635681.

It is a happy number.

The square root of 18653657344144 is 4318988.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3719451673744 + 14934205670400 = 1928588^2 + 3864480^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1433897512 + ... + 1433910520.

Almost surely, 2^{18653657344144} is an apocalyptic number.

18653657344144 is the 4318988-th square number.

It is an amenable number.

18653657344144 is a deficient number, since it is larger than the sum of its proper divisors (17931301587689).

18653657344144 is an frugal number, since it uses more digits than its factorization.

18653657344144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26192 (or 13094 counting only the distinct ones).

The product of its digits is 116121600, while the sum is 61.

The spelling of 18653657344144 in words is "eighteen trillion, six hundred fifty-three billion, six hundred fifty-seven million, three hundred forty-four thousand, one hundred forty-four".