68862681889 has 9 divisors (see below), whose sum is σ = 69141177081. Its totient is φ = 68585307120.

The previous prime is 68862681871. The next prime is 68862681913. The reversal of 68862681889 is 98818626886.

The square root of 68862681889 is 262417.

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

It can be written as a sum of positive squares in 4 ways, for example, as 15135150625 + 53727531264 = 123025^2 + 231792^2 .

It is a de Polignac number, because none of the positive numbers 2^k-68862681889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68862681809) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 104179219 + ... + 104179879.

It is an arithmetic number, because the mean of its divisors is an integer number (7682353009).

Almost surely, 2^68862681889 is an apocalyptic number.

68862681889 is the 262417-th square number.

68862681889 is the 131209-th centered octagonal number.

It is an amenable number.

68862681889 is a deficient number, since it is larger than the sum of its proper divisors (278495192).

68862681889 is an frugal number, since it uses more digits than its factorization.

68862681889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116 (or 1058 counting only the distinct ones).

The product of its digits is 127401984, while the sum is 70.

The spelling of 68862681889 in words is "sixty-eight billion, eight hundred sixty-two million, six hundred eighty-one thousand, eight hundred eighty-nine".