1836664327680 has 640 divisors, whose sum is σ = 7283821805568. Its totient is φ = 384446103552.

The previous prime is 1836664327661. The next prime is 1836664327711. The reversal of 1836664327680 is 867234666381.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 88747414 + ... + 88768106.

Almost surely, 2^{1836664327680} is an apocalyptic number.

1836664327680 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 1836664327680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3641910902784).

1836664327680 is an abundant number, since it is smaller than the sum of its proper divisors (5447157477888).

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

1836664327680 is a wasteful number, since it uses less digits than its factorization.

1836664327680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20866 (or 20850 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 60.

The spelling of 1836664327680 in words is "one trillion, eight hundred thirty-six billion, six hundred sixty-four million, three hundred twenty-seven thousand, six hundred eighty".