27280872901 has 2 divisors, whose sum is σ = 27280872902. Its totient is φ = 27280872900.

The previous prime is 27280872887. The next prime is 27280872977. The reversal of 27280872901 is 10927808272.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20387556225 + 6893316676 = 142785^2 + 83026^2 .

It is a cyclic number.

It is not a de Polignac number, because 27280872901 - 2³³ = 18690938309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27283872901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13640436450 + 13640436451.

It is an arithmetic number, because the mean of its divisors is an integer number (13640436451).

Almost surely, 2^27280872901 is an apocalyptic number.

It is an amenable number.

27280872901 is a deficient number, since it is larger than the sum of its proper divisors (1).

27280872901 is an equidigital number, since it uses as much as digits as its factorization.

27280872901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 46.

The spelling of 27280872901 in words is "twenty-seven billion, two hundred eighty million, eight hundred seventy-two thousand, nine hundred one".