27195637901 has 2 divisors, whose sum is σ = 27195637902. Its totient is φ = 27195637900.

The previous prime is 27195637873. The next prime is 27195637957. The reversal of 27195637901 is 10973659172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21344917801 + 5850720100 = 146099^2 + 76490^2 .

It is a cyclic number.

It is not a de Polignac number, because 27195637901 - 2⁶ = 27195637837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27195637901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27195637981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13597818950 + 13597818951.

It is an arithmetic number, because the mean of its divisors is an integer number (13597818951).

Almost surely, 2^27195637901 is an apocalyptic number.

It is an amenable number.

27195637901 is a deficient number, since it is larger than the sum of its proper divisors (1).

27195637901 is an equidigital number, since it uses as much as digits as its factorization.

27195637901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 714420, while the sum is 50.

The spelling of 27195637901 in words is "twenty-seven billion, one hundred ninety-five million, six hundred thirty-seven thousand, nine hundred one".