288657978361 has 3 divisors (see below), whose sum is σ = 288658515631. Its totient is φ = 288657441092.

The previous prime is 288657978353. The next prime is 288657978407. The reversal of 288657978361 is 163879756882.

The square root of 288657978361 is 537269.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 229890521961 + 58767456400 = 479469^2 + 242420^2 .

It is not a de Polignac number, because 288657978361 - 2³ = 288657978353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (288657978341) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 268635 + ... + 805903.

Almost surely, 2^288657978361 is an apocalyptic number.

288657978361 is the 537269-th square number.

288657978361 is the 268635-th centered octagonal number.

It is an amenable number.

288657978361 is a deficient number, since it is larger than the sum of its proper divisors (537270).

288657978361 is an frugal number, since it uses more digits than its factorization.

288657978361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074538 (or 537269 counting only the distinct ones).

The product of its digits is 243855360, while the sum is 70.

The spelling of 288657978361 in words is "two hundred eighty-eight billion, six hundred fifty-seven million, nine hundred seventy-eight thousand, three hundred sixty-one".