26112297649 has 9 divisors (see below), whose sum is σ = 26250866649. Its totient is φ = 25974458820.

The previous prime is 26112297641. The next prime is 26112297671. The reversal of 26112297649 is 94679221162.

It is a happy number.

The square root of 26112297649 is 161593.

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

It is not a de Polignac number, because 26112297649 - 2³ = 26112297641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26112297641) 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, 45730534 + ... + 45731104.

It is an arithmetic number, because the mean of its divisors is an integer number (2916762961).

Almost surely, 2^26112297649 is an apocalyptic number.

26112297649 is the 161593-rd square number.

26112297649 is the 80797-th centered octagonal number.

It is an amenable number.

26112297649 is a deficient number, since it is larger than the sum of its proper divisors (138569000).

26112297649 is an frugal number, since it uses more digits than its factorization.

26112297649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708 (or 854 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

Multiplying 26112297649 by its sum of digits (49), we get a square (1279502584801 = 1131151²).

It can be divided in two parts, 26112 and 297649, that added together give a square (323761 = 569²).

The spelling of 26112297649 in words is "twenty-six billion, one hundred twelve million, two hundred ninety-seven thousand, six hundred forty-nine".