1816068720 has 160 divisors (see below), whose sum is σ = 5798200320. Its totient is φ = 469980160.

The previous prime is 1816068713. The next prime is 1816068733. The reversal of 1816068720 is 278606181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1477066 + ... + 1478294.

It is an arithmetic number, because the mean of its divisors is an integer number (36238752).

Almost surely, 2^1816068720 is an apocalyptic number.

1816068720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1816068720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2899100160).

1816068720 is an abundant number, since it is smaller than the sum of its proper divisors (3982131600).

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

1816068720 is a wasteful number, since it uses less digits than its factorization.

1816068720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423 (or 1417 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 1816068720 is about 42615.3577950485. The cubic root of 1816068720 is about 1220.0494291538.

The spelling of 1816068720 in words is "one billion, eight hundred sixteen million, sixty-eight thousand, seven hundred twenty".