27294945961 has 2 divisors, whose sum is σ = 27294945962. Its totient is φ = 27294945960.

The previous prime is 27294945913. The next prime is 27294945967. The reversal of 27294945961 is 16954949272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23969232400 + 3325713561 = 154820^2 + 57669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27294945961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27294945896 and 27294945905.

It is not a weakly prime, because it can be changed into another prime (27294945967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13647472980 + 13647472981.

It is an arithmetic number, because the mean of its divisors is an integer number (13647472981).

Almost surely, 2^27294945961 is an apocalyptic number.

It is an amenable number.

27294945961 is a deficient number, since it is larger than the sum of its proper divisors (1).

27294945961 is an equidigital number, since it uses as much as digits as its factorization.

27294945961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 58.

The spelling of 27294945961 in words is "twenty-seven billion, two hundred ninety-four million, nine hundred forty-five thousand, nine hundred sixty-one".