27031929161 has 2 divisors, whose sum is σ = 27031929162. Its totient is φ = 27031929160.

The previous prime is 27031929157. The next prime is 27031929209. The reversal of 27031929161 is 16192913072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24631419136 + 2400510025 = 156944^2 + 48995^2 .

It is a cyclic number.

It is not a de Polignac number, because 27031929161 - 2² = 27031929157 is a prime.

It is not a weakly prime, because it can be changed into another prime (27031929101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13515964580 + 13515964581.

It is an arithmetic number, because the mean of its divisors is an integer number (13515964581).

Almost surely, 2^27031929161 is an apocalyptic number.

It is an amenable number.

27031929161 is a deficient number, since it is larger than the sum of its proper divisors (1).

27031929161 is an equidigital number, since it uses as much as digits as its factorization.

27031929161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 27031929161 in words is "twenty-seven billion, thirty-one million, nine hundred twenty-nine thousand, one hundred sixty-one".