26989232656 has 45 divisors (see below), whose sum is σ = 53170497261. Its totient is φ = 13271518656.

The previous prime is 26989232587. The next prime is 26989232663. The reversal of 26989232656 is 65623298962.

The square root of 26989232656 is 164284.

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

It can be written as a sum of positive squares in only one way, i.e., 87984400 + 26901248256 = 9380^2 + 164016^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26989232656.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 44027806 + ... + 44028418.

Almost surely, 2^26989232656 is an apocalyptic number.

26989232656 is the 164284-th square number.

It is an amenable number.

26989232656 is a deficient number, since it is larger than the sum of its proper divisors (26181264605).

26989232656 is an frugal number, since it uses more digits than its factorization.

26989232656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368 (or 682 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 58.

The spelling of 26989232656 in words is "twenty-six billion, nine hundred eighty-nine million, two hundred thirty-two thousand, six hundred fifty-six".