21778300026275 has 24 divisors (see below), whose sum is σ = 30085248431280. Its totient is φ = 15527870144640.

The previous prime is 21778300026271. The next prime is 21778300026341. The reversal of 21778300026275 is 57262000387712.

It is not a de Polignac number, because 21778300026275 - 2² = 21778300026271 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21778300026271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1155338057 + ... + 1155356906.

It is an arithmetic number, because the mean of its divisors is an integer number (1253552017970).

Almost surely, 2^{21778300026275} is an apocalyptic number.

21778300026275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21778300026275 is a deficient number, since it is larger than the sum of its proper divisors (8306948405005).

21778300026275 is a wasteful number, since it uses less digits than its factorization.

21778300026275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310695015 (or 2310695010 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 50.

The spelling of 21778300026275 in words is "twenty-one trillion, seven hundred seventy-eight billion, three hundred million, twenty-six thousand, two hundred seventy-five".