27900357673 has 2 divisors, whose sum is σ = 27900357674. Its totient is φ = 27900357672.

The previous prime is 27900357601. The next prime is 27900357697. The reversal of 27900357673 is 37675300972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16448575504 + 11451782169 = 128252^2 + 107013^2 .

It is a cyclic number.

It is not a de Polignac number, because 27900357673 - 2²¹ = 27898260521 is a prime.

It is not a weakly prime, because it can be changed into another prime (27900351673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13950178836 + 13950178837.

It is an arithmetic number, because the mean of its divisors is an integer number (13950178837).

Almost surely, 2^27900357673 is an apocalyptic number.

It is an amenable number.

27900357673 is a deficient number, since it is larger than the sum of its proper divisors (1).

27900357673 is an equidigital number, since it uses as much as digits as its factorization.

27900357673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1666980, while the sum is 49.

The spelling of 27900357673 in words is "twenty-seven billion, nine hundred million, three hundred fifty-seven thousand, six hundred seventy-three".