27773505061 has 4 divisors (see below), whose sum is σ = 27773940832. Its totient is φ = 27773069292.

The previous prime is 27773505049. The next prime is 27773505107. The reversal of 27773505061 is 16050537772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27773505061 - 2¹⁹ = 27772980773 is a prime.

It is a super-2 number, since 2×27773505061² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27773504999 and 27773505017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27773505961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101595 + ... + 256648.

It is an arithmetic number, because the mean of its divisors is an integer number (6943485208).

Almost surely, 2^27773505061 is an apocalyptic number.

It is an amenable number.

27773505061 is a deficient number, since it is larger than the sum of its proper divisors (435771).

27773505061 is an equidigital number, since it uses as much as digits as its factorization.

27773505061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435770.

The product of its (nonzero) digits is 308700, while the sum is 43.

The spelling of 27773505061 in words is "twenty-seven billion, seven hundred seventy-three million, five hundred five thousand, sixty-one".