1636982418880 has 112 divisors (see below), whose sum is σ = 4027035156480. Its totient is φ = 633162470400.

The previous prime is 1636982418859. The next prime is 1636982418887. The reversal of 1636982418880 is 888142896361.

It is a happy number.

It is a super-2 number, since 2×1636982418880² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1636982418887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12423745 + ... + 12554815.

It is an arithmetic number, because the mean of its divisors is an integer number (35955671040).

Almost surely, 2^{1636982418880} is an apocalyptic number.

1636982418880 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 1636982418880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2013517578240).

1636982418880 is an abundant number, since it is smaller than the sum of its proper divisors (2390052737600).

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

1636982418880 is a wasteful number, since it uses less digits than its factorization.

1636982418880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132378 (or 132368 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 64.

The spelling of 1636982418880 in words is "one trillion, six hundred thirty-six billion, nine hundred eighty-two million, four hundred eighteen thousand, eight hundred eighty".