27799226605 has 16 divisors (see below), whose sum is σ = 33778306800. Its totient is φ = 21960916992.

The previous prime is 27799226573. The next prime is 27799226617. The reversal of 27799226605 is 50662299772.

It can be written as a sum of positive squares in 8 ways, for example, as 4205652201 + 23593574404 = 64851^2 + 153602^2 .

It is a cyclic number.

It is not a de Polignac number, because 27799226605 - 2⁵ = 27799226573 is a prime.

It is a super-2 number, since 2×27799226605² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153937 + ... + 281593.

It is an arithmetic number, because the mean of its divisors is an integer number (2111144175).

Almost surely, 2^27799226605 is an apocalyptic number.

It is an amenable number.

27799226605 is a deficient number, since it is larger than the sum of its proper divisors (5979080195).

27799226605 is a wasteful number, since it uses less digits than its factorization.

27799226605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128208.

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 27799226605 in words is "twenty-seven billion, seven hundred ninety-nine million, two hundred twenty-six thousand, six hundred five".