47216621605609 has 2 divisors, whose sum is σ = 47216621605610. Its totient is φ = 47216621605608.

The previous prime is 47216621605507. The next prime is 47216621605613. The reversal of 47216621605609 is 90650612661274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46881450082009 + 335171523600 = 6847003^2 + 578940^2 .

It is a cyclic number.

It is not a de Polignac number, because 47216621605609 - 2²⁵ = 47216588051177 is a prime.

It is a super-2 number, since 2×47216621605609² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47216621605609.

It is not a weakly prime, because it can be changed into another prime (47216621605409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23608310802804 + 23608310802805.

It is an arithmetic number, because the mean of its divisors is an integer number (23608310802805).

Almost surely, 2^{47216621605609} is an apocalyptic number.

It is an amenable number.

47216621605609 is a deficient number, since it is larger than the sum of its proper divisors (1).

47216621605609 is an equidigital number, since it uses as much as digits as its factorization.

47216621605609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 47216621605609 in words is "forty-seven trillion, two hundred sixteen billion, six hundred twenty-one million, six hundred five thousand, six hundred nine".