18777586373445 has 16 divisors (see below), whose sum is σ = 31625408629440. Its totient is φ = 9487622588544.

The previous prime is 18777586373443. The next prime is 18777586373477. The reversal of 18777586373445 is 54437368577781.

It is not a de Polignac number, because 18777586373445 - 2¹ = 18777586373443 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18777586373443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32943133704 + ... + 32943134273.

It is an arithmetic number, because the mean of its divisors is an integer number (1976588039340).

Almost surely, 2^{18777586373445} is an apocalyptic number.

18777586373445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18777586373445 is a deficient number, since it is larger than the sum of its proper divisors (12847822255995).

18777586373445 is a wasteful number, since it uses less digits than its factorization.

18777586373445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65886268004.

The product of its digits is 3319142400, while the sum is 75.

The spelling of 18777586373445 in words is "eighteen trillion, seven hundred seventy-seven billion, five hundred eighty-six million, three hundred seventy-three thousand, four hundred forty-five".