1818765879264 has 576 divisors, whose sum is σ = 5802151170816. Its totient is φ = 558357110784.

The previous prime is 1818765879209. The next prime is 1818765879289. The reversal of 1818765879264 is 4629785678181.

It is a happy number.

1818765879264 is a `hidden beast` number, since 1 + 8 + 18 + 7 + 6 + 587 + 9 + 26 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 1818765879192 and 1818765879201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1532236879 + ... + 1532238065.

It is an arithmetic number, because the mean of its divisors is an integer number (10073179116).

Almost surely, 2^{1818765879264} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1818765879264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2901075585408).

1818765879264 is an abundant number, since it is smaller than the sum of its proper divisors (3983385291552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1818765879264 is a wasteful number, since it uses less digits than its factorization.

1818765879264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469 (or 1449 counting only the distinct ones).

The product of its digits is 325140480, while the sum is 72.

The spelling of 1818765879264 in words is "one trillion, eight hundred eighteen billion, seven hundred sixty-five million, eight hundred seventy-nine thousand, two hundred sixty-four".