26409963944 has 288 divisors, whose sum is σ = 65209605120. Its totient is φ = 9985876992.

The previous prime is 26409963911. The next prime is 26409963959. The reversal of 26409963944 is 44936990462.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a self number, because there is not a number n which added to its sum of digits gives 26409963944.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 207952409 + ... + 207952535.

It is an arithmetic number, because the mean of its divisors is an integer number (226422240).

Almost surely, 2^26409963944 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 26409963944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32604802560).

26409963944 is an abundant number, since it is smaller than the sum of its proper divisors (38799641176).

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

26409963944 is a wasteful number, since it uses less digits than its factorization.

26409963944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 56.

The spelling of 26409963944 in words is "twenty-six billion, four hundred nine million, nine hundred sixty-three thousand, nine hundred forty-four".