47156318609 has 2 divisors, whose sum is σ = 47156318610. Its totient is φ = 47156318608.

The previous prime is 47156318593. The next prime is 47156318621. The reversal of 47156318609 is 90681365174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41821477009 + 5334841600 = 204503^2 + 73040^2 .

It is a cyclic number.

It is not a de Polignac number, because 47156318609 - 2⁴ = 47156318593 is a prime.

It is not a weakly prime, because it can be changed into another prime (47156318669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23578159304 + 23578159305.

It is an arithmetic number, because the mean of its divisors is an integer number (23578159305).

Almost surely, 2^47156318609 is an apocalyptic number.

It is an amenable number.

47156318609 is a deficient number, since it is larger than the sum of its proper divisors (1).

47156318609 is an equidigital number, since it uses as much as digits as its factorization.

47156318609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 47156318609 in words is "forty-seven billion, one hundred fifty-six million, three hundred eighteen thousand, six hundred nine".