27800755061 has 8 divisors (see below), whose sum is σ = 29623587480. Its totient is φ = 25998755328.

The previous prime is 27800755057. The next prime is 27800755067. The reversal of 27800755061 is 16055700872.

It can be written as a sum of positive squares in 4 ways, for example, as 12327882961 + 15472872100 = 111031^2 + 124390^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27800755061 - 2² = 27800755057 is a prime.

It is a super-2 number, since 2×27800755061² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27800755067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5205416 + ... + 5210753.

It is an arithmetic number, because the mean of its divisors is an integer number (3702948435).

Almost surely, 2^27800755061 is an apocalyptic number.

It is an amenable number.

27800755061 is a deficient number, since it is larger than the sum of its proper divisors (1822832419).

27800755061 is a wasteful number, since it uses less digits than its factorization.

27800755061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10416343.

The product of its (nonzero) digits is 117600, while the sum is 41.

The spelling of 27800755061 in words is "twenty-seven billion, eight hundred million, seven hundred fifty-five thousand, sixty-one".