1801665168336 has 280 divisors, whose sum is σ = 6009993059040. Its totient is φ = 517223750400.

The previous prime is 1801665168239. The next prime is 1801665168383. The reversal of 1801665168336 is 6338615661081.

1801665168336 is a `hidden beast` number, since 1 + 8 + 0 + 16 + 6 + 516 + 83 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2068246 + ... + 2807306.

Almost surely, 2^{1801665168336} is an apocalyptic number.

1801665168336 is a gapful number since it is divisible by the number (16) 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 1801665168336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3004996529520).

1801665168336 is an abundant number, since it is smaller than the sum of its proper divisors (4208327890704).

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

1801665168336 is a wasteful number, since it uses less digits than its factorization.

1801665168336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739117 (or 739096 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 1801665168336 in words is "one trillion, eight hundred one billion, six hundred sixty-five million, one hundred sixty-eight thousand, three hundred thirty-six".