47216621605541 has 4 divisors (see below), whose sum is σ = 47283217687500. Its totient is φ = 47150025523584.

The previous prime is 47216621605507. The next prime is 47216621605609. The reversal of 47216621605541 is 14550612661274.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11715628296100 + 35500993309441 = 3422810^2 + 5958271^2 .

It is a cyclic number.

It is not a de Polignac number, because 47216621605541 - 2⁶ = 47216621605477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47216621605541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47216621625541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33298039916 + ... + 33298041333.

It is an arithmetic number, because the mean of its divisors is an integer number (11820804421875).

Almost surely, 2^{47216621605541} is an apocalyptic number.

It is an amenable number.

47216621605541 is a deficient number, since it is larger than the sum of its proper divisors (66596081959).

47216621605541 is an equidigital number, since it uses as much as digits as its factorization.

47216621605541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66596081958.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 47216621605541 in words is "forty-seven trillion, two hundred sixteen billion, six hundred twenty-one million, six hundred five thousand, five hundred forty-one".