18373900448961 has 64 divisors (see below), whose sum is σ = 27552936015360. Its totient is φ = 12100212449280.

The previous prime is 18373900448941. The next prime is 18373900448971. The reversal of 18373900448961 is 16984400937381.

18373900448961 is a `hidden beast` number, since 1 + 8 + 3 + 7 + 3 + 90 + 0 + 4 + 489 + 61 = 666.

It is not a de Polignac number, because 18373900448961 - 2⁷ = 18373900448833 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18373900448941) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 3945434745 + ... + 3945439401.

It is an arithmetic number, because the mean of its divisors is an integer number (430514625240).

Almost surely, 2^{18373900448961} is an apocalyptic number.

It is an amenable number.

18373900448961 is a deficient number, since it is larger than the sum of its proper divisors (9179035566399).

18373900448961 is a wasteful number, since it uses less digits than its factorization.

18373900448961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7271 (or 7265 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 18373900448961 in words is "eighteen trillion, three hundred seventy-three billion, nine hundred million, four hundred forty-eight thousand, nine hundred sixty-one".