1818724680816 has 40 divisors (see below), whose sum is σ = 4754978995200. Its totient is φ = 598937443776.

The previous prime is 1818724680809. The next prime is 1818724680859. The reversal of 1818724680816 is 6180864278181.

It is a super-2 number, since 2×1818724680816² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1818724680816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228249616 + ... + 228257583.

It is an arithmetic number, because the mean of its divisors is an integer number (118874474880).

Almost surely, 2^{1818724680816} is an apocalyptic number.

1818724680816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1818724680816 is an abundant number, since it is smaller than the sum of its proper divisors (2936254314384).

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

1818724680816 is a wasteful number, since it uses less digits than its factorization.

1818724680816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456507293 (or 456507287 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 60.

The spelling of 1818724680816 in words is "one trillion, eight hundred eighteen billion, seven hundred twenty-four million, six hundred eighty thousand, eight hundred sixteen".