27361596721 has 2 divisors, whose sum is σ = 27361596722. Its totient is φ = 27361596720.

The previous prime is 27361596637. The next prime is 27361596767. The reversal of 27361596721 is 12769516372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17998905600 + 9362691121 = 134160^2 + 96761^2 .

It is a cyclic number.

It is not a de Polignac number, because 27361596721 - 2⁷ = 27361596593 is a prime.

It is not a weakly prime, because it can be changed into another prime (27361590721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13680798360 + 13680798361.

It is an arithmetic number, because the mean of its divisors is an integer number (13680798361).

Almost surely, 2^27361596721 is an apocalyptic number.

It is an amenable number.

27361596721 is a deficient number, since it is larger than the sum of its proper divisors (1).

27361596721 is an equidigital number, since it uses as much as digits as its factorization.

27361596721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 49.

The spelling of 27361596721 in words is "twenty-seven billion, three hundred sixty-one million, five hundred ninety-six thousand, seven hundred twenty-one".