26297811556 has 9 divisors (see below), whose sum is σ = 46021737811. Its totient is φ = 13148743612.

The previous prime is 26297811511. The next prime is 26297811569. The reversal of 26297811556 is 65511879262.

It is a happy number.

The square root of 26297811556 is 162166.

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

It is a super-2 number, since 2×26297811556² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 283791 + ... + 364873.

Almost surely, 2^26297811556 is an apocalyptic number.

26297811556 is the 162166-th square number.

It is an amenable number.

26297811556 is a deficient number, since it is larger than the sum of its proper divisors (19723926255).

26297811556 is an frugal number, since it uses more digits than its factorization.

26297811556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162170 (or 81085 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 52.

The spelling of 26297811556 in words is "twenty-six billion, two hundred ninety-seven million, eight hundred eleven thousand, five hundred fifty-six".