201544555040 has 96 divisors (see below), whose sum is σ = 501699744000. Its totient is φ = 76300075008.

The previous prime is 201544555031. The next prime is 201544555057. The reversal of 201544555040 is 40555445102.

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, 3126656 + ... + 3190464.

It is an arithmetic number, because the mean of its divisors is an integer number (5226039000).

Almost surely, 2^201544555040 is an apocalyptic number.

201544555040 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 201544555040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250849872000).

201544555040 is an abundant number, since it is smaller than the sum of its proper divisors (300155188960).

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

201544555040 is a wasteful number, since it uses less digits than its factorization.

201544555040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64882 (or 64874 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 35.

The spelling of 201544555040 in words is "two hundred one billion, five hundred forty-four million, five hundred fifty-five thousand, forty".