201999450240 has 1024 divisors, whose sum is σ = 843384960000. Its totient is φ = 45671399424.

The previous prime is 201999450199. The next prime is 201999450277. The reversal of 201999450240 is 42054999102.

201999450240 is a `hidden beast` number, since 2 + 0 + 19 + 9 + 94 + 502 + 40 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1025377822 + ... + 1025378018.

It is an arithmetic number, because the mean of its divisors is an integer number (823618125).

Almost surely, 2^201999450240 is an apocalyptic number.

201999450240 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 201999450240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421692480000).

201999450240 is an abundant number, since it is smaller than the sum of its proper divisors (641385509760).

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

201999450240 is a wasteful number, since it uses less digits than its factorization.

201999450240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 201999450240 in words is "two hundred one billion, nine hundred ninety-nine million, four hundred fifty thousand, two hundred forty".