1816747043664 has 960 divisors, whose sum is σ = 6160834887680. Its totient is φ = 449913139200.

The previous prime is 1816747043651. The next prime is 1816747043689. The reversal of 1816747043664 is 4663407476181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 14305094769 + ... + 14305094895.

Almost surely, 2^{1816747043664} is an apocalyptic number.

1816747043664 is a gapful number since it is divisible by the number (14) 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 1816747043664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3080417443840).

1816747043664 is an abundant number, since it is smaller than the sum of its proper divisors (4344087844016).

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

1816747043664 is a wasteful number, since it uses less digits than its factorization.

1816747043664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 57.

The spelling of 1816747043664 in words is "one trillion, eight hundred sixteen billion, seven hundred forty-seven million, forty-three thousand, six hundred sixty-four".