40647506161 has 2 divisors, whose sum is σ = 40647506162. Its totient is φ = 40647506160.

The previous prime is 40647506143. The next prime is 40647506173. The reversal of 40647506161 is 16160574604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23732943025 + 16914563136 = 154055^2 + 130056^2 .

It is a cyclic number.

It is not a de Polignac number, because 40647506161 - 2²⁷ = 40513288433 is a prime.

It is not a weakly prime, because it can be changed into another prime (40647506101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20323753080 + 20323753081.

It is an arithmetic number, because the mean of its divisors is an integer number (20323753081).

Almost surely, 2^40647506161 is an apocalyptic number.

It is an amenable number.

40647506161 is a deficient number, since it is larger than the sum of its proper divisors (1).

40647506161 is an equidigital number, since it uses as much as digits as its factorization.

40647506161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 40647506161 in words is "forty billion, six hundred forty-seven million, five hundred six thousand, one hundred sixty-one".