201915866880 has 720 divisors, whose sum is σ = 889262345664. Its totient is φ = 42600038400.

The previous prime is 201915866851. The next prime is 201915866903. The reversal of 201915866880 is 88668519102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (720).

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 79 ways as a sum of consecutive naturals, for example, 9424180 + ... + 9445580.

Almost surely, 2^201915866880 is an apocalyptic number.

201915866880 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 201915866880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (444631172832).

201915866880 is an abundant number, since it is smaller than the sum of its proper divisors (687346478784).

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

201915866880 is a wasteful number, since it uses less digits than its factorization.

201915866880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21454 (or 21431 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 54.

The spelling of 201915866880 in words is "two hundred one billion, nine hundred fifteen million, eight hundred sixty-six thousand, eight hundred eighty".