27205372451 has 2 divisors, whose sum is σ = 27205372452. Its totient is φ = 27205372450.

The previous prime is 27205372421. The next prime is 27205372487. The reversal of 27205372451 is 15427350272.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27205372451 is a prime.

It is not a weakly prime, because it can be changed into another prime (27205372421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13602686225 + 13602686226.

It is an arithmetic number, because the mean of its divisors is an integer number (13602686226).

Almost surely, 2^27205372451 is an apocalyptic number.

27205372451 is a deficient number, since it is larger than the sum of its proper divisors (1).

27205372451 is an equidigital number, since it uses as much as digits as its factorization.

27205372451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117600, while the sum is 38.

The spelling of 27205372451 in words is "twenty-seven billion, two hundred five million, three hundred seventy-two thousand, four hundred fifty-one".