201538529280 has 1152 divisors, whose sum is σ = 808040862720. Its totient is φ = 46389657600.

The previous prime is 201538529243. The next prime is 201538529287. The reversal of 201538529280 is 82925835102.

201538529280 is a `hidden beast` number, since 2 + 0 + 15 + 38 + 529 + 2 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

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

It is not an unprimeable number, because it can be changed into a prime (201538529287) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3802613734 + ... + 3802613786.

It is an arithmetic number, because the mean of its divisors is an integer number (701424360).

Almost surely, 2^201538529280 is an apocalyptic number.

201538529280 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 201538529280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404020431360).

201538529280 is an abundant number, since it is smaller than the sum of its proper divisors (606502333440).

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

201538529280 is a wasteful number, since it uses less digits than its factorization.

201538529280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 201538529280 in words is "two hundred one billion, five hundred thirty-eight million, five hundred twenty-nine thousand, two hundred eighty".