201381866720 has 96 divisors (see below), whose sum is σ = 510846388416. Its totient is φ = 74746470400.

The previous prime is 201381866717. The next prime is 201381866753. The reversal of 201381866720 is 27668183102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328271 + ... + 714510.

It is an arithmetic number, because the mean of its divisors is an integer number (5321316546).

Almost surely, 2^201381866720 is an apocalyptic number.

201381866720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201381866720 is an abundant number, since it is smaller than the sum of its proper divisors (309464521696).

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

201381866720 is a wasteful number, since it uses less digits than its factorization.

201381866720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042884 (or 1042876 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 201381866720 in words is "two hundred one billion, three hundred eighty-one million, eight hundred sixty-six thousand, seven hundred twenty".