27726780458 has 32 divisors (see below), whose sum is σ = 45912100752. Its totient is φ = 12484047360.

The previous prime is 27726780449. The next prime is 27726780469. The reversal of 27726780458 is 85408762772.

It can be written as a sum of positive squares in 8 ways, for example, as 11161288609 + 16565491849 = 105647^2 + 128707^2 .

It is a super-2 number, since 2×27726780458² (a number of 22 digits) contains 22 as substring.

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, 1784210 + ... + 1799682.

Almost surely, 2^27726780458 is an apocalyptic number.

27726780458 is a deficient number, since it is larger than the sum of its proper divisors (18185320294).

27726780458 is an equidigital number, since it uses as much as digits as its factorization.

27726780458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15611 (or 15529 counting only the distinct ones).

The product of its (nonzero) digits is 10536960, while the sum is 56.

The spelling of 27726780458 in words is "twenty-seven billion, seven hundred twenty-six million, seven hundred eighty thousand, four hundred fifty-eight".