1816955712 has 672 divisors, whose sum is σ = 6834347520. Its totient is φ = 470292480.

The previous prime is 1816955683. The next prime is 1816955717. The reversal of 1816955712 is 2175596181.

1816955712 is a `hidden beast` number, since 1 + 81 + 6 + 9 + 557 + 12 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816955717) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 42254763 + ... + 42254805.

It is an arithmetic number, because the mean of its divisors is an integer number (10170160).

Almost surely, 2^1816955712 is an apocalyptic number.

1816955712 is a gapful number since it is divisible by the number (12) 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 1816955712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3417173760).

1816955712 is an abundant number, since it is smaller than the sum of its proper divisors (5017391808).

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

1816955712 is a wasteful number, since it uses less digits than its factorization.

1816955712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 91 counting only the distinct ones).

The product of its digits is 151200, while the sum is 45.

The square root of 1816955712 is about 42625.7634770335. The cubic root of 1816955712 is about 1220.2480262547.

The spelling of 1816955712 in words is "one billion, eight hundred sixteen million, nine hundred fifty-five thousand, seven hundred twelve".