27352761421 has 2 divisors, whose sum is σ = 27352761422. Its totient is φ = 27352761420.

The previous prime is 27352761419. The next prime is 27352761481. The reversal of 27352761421 is 12416725372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26336745796 + 1016015625 = 162286^2 + 31875^2 .

It is a cyclic number.

It is not a de Polignac number, because 27352761421 - 2¹ = 27352761419 is a prime.

Together with 27352761419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27352761481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13676380710 + 13676380711.

It is an arithmetic number, because the mean of its divisors is an integer number (13676380711).

Almost surely, 2^27352761421 is an apocalyptic number.

It is an amenable number.

27352761421 is a deficient number, since it is larger than the sum of its proper divisors (1).

27352761421 is an equidigital number, since it uses as much as digits as its factorization.

27352761421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 40.

The spelling of 27352761421 in words is "twenty-seven billion, three hundred fifty-two million, seven hundred sixty-one thousand, four hundred twenty-one".