26381221856 has 48 divisors (see below), whose sum is σ = 56694919680. Its totient is φ = 11984004480.

The previous prime is 26381221819. The next prime is 26381221879. The reversal of 26381221856 is 65812218362.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564305 + ... + 609263.

It is an arithmetic number, because the mean of its divisors is an integer number (1181144160).

Almost surely, 2^26381221856 is an apocalyptic number.

It is an amenable number.

26381221856 is an abundant number, since it is smaller than the sum of its proper divisors (30313697824).

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

26381221856 is a wasteful number, since it uses less digits than its factorization.

26381221856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46647 (or 46639 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The spelling of 26381221856 in words is "twenty-six billion, three hundred eighty-one million, two hundred twenty-one thousand, eight hundred fifty-six".