827201905540 has 24 divisors (see below), whose sum is σ = 1839307767192. Its totient is φ = 311417187840.

The previous prime is 827201905513. The next prime is 827201905571. The reversal of 827201905540 is 45509102728.

It can be written as a sum of positive squares in 4 ways, for example, as 99783964996 + 727417940544 = 315886^2 + 852888^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1216473051 + ... + 1216473730.

It is an arithmetic number, because the mean of its divisors is an integer number (76637823633).

Almost surely, 2^827201905540 is an apocalyptic number.

It is an amenable number.

827201905540 is an abundant number, since it is smaller than the sum of its proper divisors (1012105861652).

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

827201905540 is a wasteful number, since it uses less digits than its factorization.

827201905540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432946807 (or 2432946805 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 827201905540 in words is "eight hundred twenty-seven billion, two hundred one million, nine hundred five thousand, five hundred forty".