201899813640 has 384 divisors, whose sum is σ = 728096221440. Its totient is φ = 44624369664.

The previous prime is 201899813627. The next prime is 201899813657. The reversal of 201899813640 is 46318998102.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 36329742 + ... + 36335298.

It is an arithmetic number, because the mean of its divisors is an integer number (1896083910).

Almost surely, 2^201899813640 is an apocalyptic number.

201899813640 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 201899813640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (364048110720).

201899813640 is an abundant number, since it is smaller than the sum of its proper divisors (526196407800).

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

201899813640 is a wasteful number, since it uses less digits than its factorization.

201899813640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5789 (or 5778 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The spelling of 201899813640 in words is "two hundred one billion, eight hundred ninety-nine million, eight hundred thirteen thousand, six hundred forty".