201650401920 has 128 divisors (see below), whose sum is σ = 701193516480. Its totient is φ = 48884940800.

The previous prime is 201650401889. The next prime is 201650401921. The reversal of 201650401920 is 29104056102.

201650401920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (201650401921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4752801 + ... + 4795040.

Almost surely, 2^201650401920 is an apocalyptic number.

201650401920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201650401920 is an abundant number, since it is smaller than the sum of its proper divisors (499543114560).

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

201650401920 is a wasteful number, since it uses less digits than its factorization.

201650401920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9547874 (or 9547862 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 201650401920 in words is "two hundred one billion, six hundred fifty million, four hundred one thousand, nine hundred twenty".