288539791281 has 27 divisors (see below), whose sum is σ = 484844318361. Its totient is φ = 164873434824.

The previous prime is 288539791279. The next prime is 288539791297. The reversal of 288539791281 is 182197935882.

The square root of 288539791281 is 537159.

It is a perfect power (a square), and thus also a powerful number.

288539791281 is a `hidden beast` number, since 2 + 8 + 8 + 539 + 7 + 9 + 12 + 81 = 666.

It is not a de Polignac number, because 288539791281 - 2¹ = 288539791279 is a prime.

It is a super-2 number, since 2×288539791281² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (288539791261) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 11267550 + ... + 11293128.

Almost surely, 2^288539791281 is an apocalyptic number.

288539791281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

288539791281 is the 537159-th square number.

288539791281 is the 268580-th centered octagonal number.

It is an amenable number.

288539791281 is a deficient number, since it is larger than the sum of its proper divisors (196304527080).

288539791281 is an frugal number, since it uses more digits than its factorization.

288539791281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51178 (or 25589 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 63.

The spelling of 288539791281 in words is "two hundred eighty-eight billion, five hundred thirty-nine million, seven hundred ninety-one thousand, two hundred eighty-one".