26985289984 has 27 divisors (see below), whose sum is σ = 53870415627. Its totient is φ = 13491330816.

The previous prime is 26985289963. The next prime is 26985289993. The reversal of 26985289984 is 48998258962.

The square root of 26985289984 is 164272.

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

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2623219 + ... + 2633485.

Almost surely, 2^26985289984 is an apocalyptic number.

26985289984 is the 164272-nd square number.

It is an amenable number.

26985289984 is a deficient number, since it is larger than the sum of its proper divisors (26885125643).

26985289984 is an frugal number, since it uses more digits than its factorization.

26985289984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20550 (or 10269 counting only the distinct ones).

The product of its digits is 179159040, while the sum is 70.

It can be divided in two parts, 26985 and 289984, that added together give a square (316969 = 563²).

The spelling of 26985289984 in words is "twenty-six billion, nine hundred eighty-five million, two hundred eighty-nine thousand, nine hundred eighty-four".