22081661834257 has 4 divisors (see below), whose sum is σ = 22193751488436. Its totient is φ = 21969572180080.

The previous prime is 22081661834251. The next prime is 22081661834339. The reversal of 22081661834257 is 75243816618022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10645367900176 + 11436293934081 = 3262724^2 + 3381759^2 .

It is a cyclic number.

It is not a de Polignac number, because 22081661834257 - 2¹⁵ = 22081661801489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22081661834198 and 22081661834207.

It is not an unprimeable number, because it can be changed into a prime (22081661834251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56044826794 + ... + 56044827187.

It is an arithmetic number, because the mean of its divisors is an integer number (5548437872109).

Almost surely, 2^{22081661834257} is an apocalyptic number.

It is an amenable number.

22081661834257 is a deficient number, since it is larger than the sum of its proper divisors (112089654179).

22081661834257 is a wasteful number, since it uses less digits than its factorization.

22081661834257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112089654178.

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 22081661834257 in words is "twenty-two trillion, eighty-one billion, six hundred sixty-one million, eight hundred thirty-four thousand, two hundred fifty-seven".