26257289796 has 18 divisors (see below), whose sum is σ = 66372593742. Its totient is φ = 8752429920.

The previous prime is 26257289771. The next prime is 26257289833. The reversal of 26257289796 is 69798275262.

26257289796 is a `hidden beast` number, since 262 + 5 + 7 + 289 + 7 + 96 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21180727296 + 5076562500 = 145536^2 + 71250^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×26257289796² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 364684545 + ... + 364684616.

It is an arithmetic number, because the mean of its divisors is an integer number (3687366319).

Almost surely, 2^26257289796 is an apocalyptic number.

It is an amenable number.

26257289796 is an abundant number, since it is smaller than the sum of its proper divisors (40115303946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26257289796 is a wasteful number, since it uses less digits than its factorization.

26257289796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729369171 (or 729369166 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 26257289796 in words is "twenty-six billion, two hundred fifty-seven million, two hundred eighty-nine thousand, seven hundred ninety-six".