26290137968 has 80 divisors (see below), whose sum is σ = 57303832320. Its totient is φ = 11610897408.

The previous prime is 26290137959. The next prime is 26290137983. The reversal of 26290137968 is 86973109262.

It is a happy number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 529205 + ... + 576747.

It is an arithmetic number, because the mean of its divisors is an integer number (716297904).

Almost surely, 2^26290137968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26290137968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28651916160).

26290137968 is an abundant number, since it is smaller than the sum of its proper divisors (31013694352).

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

26290137968 is a wasteful number, since it uses less digits than its factorization.

26290137968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47694 (or 47688 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 26290137968 in words is "twenty-six billion, two hundred ninety million, one hundred thirty-seven thousand, nine hundred sixty-eight".