27642230501 has 2 divisors, whose sum is σ = 27642230502. Its totient is φ = 27642230500.

The previous prime is 27642230491. The next prime is 27642230513. The reversal of 27642230501 is 10503224672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20412979876 + 7229250625 = 142874^2 + 85025^2 .

It is a cyclic number.

It is not a de Polignac number, because 27642230501 - 2²² = 27638036197 is a prime.

It is a super-2 number, since 2×27642230501² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27642230531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13821115250 + 13821115251.

It is an arithmetic number, because the mean of its divisors is an integer number (13821115251).

Almost surely, 2^27642230501 is an apocalyptic number.

It is an amenable number.

27642230501 is a deficient number, since it is larger than the sum of its proper divisors (1).

27642230501 is an equidigital number, since it uses as much as digits as its factorization.

27642230501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 27642230501 in words is "twenty-seven billion, six hundred forty-two million, two hundred thirty thousand, five hundred one".