26862226609 has 27 divisors (see below), whose sum is σ = 29580607083. Its totient is φ = 24387873600.

The previous prime is 26862226577. The next prime is 26862226621. The reversal of 26862226609 is 90662226862.

The square root of 26862226609 is 163897.

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., 20913498225 + 5948728384 = 144615^2 + 77128^2 .

It is not a de Polignac number, because 26862226609 - 2⁵ = 26862226577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26862226649) 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, 86373564 + ... + 86373874.

Almost surely, 2^26862226609 is an apocalyptic number.

26862226609 is the 163897-th square number.

26862226609 is the 81949-th centered octagonal number.

It is an amenable number.

26862226609 is a deficient number, since it is larger than the sum of its proper divisors (2718380474).

26862226609 is an frugal number, since it uses more digits than its factorization.

26862226609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 49.

Multiplying 26862226609 by its sum of digits (49), we get a square (1316249103841 = 1147279²).

The spelling of 26862226609 in words is "twenty-six billion, eight hundred sixty-two million, two hundred twenty-six thousand, six hundred nine".