201663444026880 has 1680 divisors, whose sum is σ = 813840387256512. Its totient is φ = 47845416960000.

The previous prime is 201663444026857. The next prime is 201663444026893. The reversal of 201663444026880 is 88620444366102.

It is a happy number.

201663444026880 is a `hidden beast` number, since 2 + 0 + 1 + 6 + 63 + 4 + 440 + 2 + 68 + 80 = 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 167 ways as a sum of consecutive naturals, for example, 10613297380 + ... + 10613316380.

Almost surely, 2^{201663444026880} is an apocalyptic number.

201663444026880 is a gapful number since it is divisible by the number (20) 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 201663444026880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406920193628256).

201663444026880 is an abundant number, since it is smaller than the sum of its proper divisors (612176943229632).

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

201663444026880 is an equidigital number, since it uses as much as digits as its factorization.

201663444026880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19111 (or 19069 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 54.

The spelling of 201663444026880 in words is "two hundred one trillion, six hundred sixty-three billion, four hundred forty-four million, twenty-six thousand, eight hundred eighty".