47799567728581 has 2 divisors, whose sum is σ = 47799567728582. Its totient is φ = 47799567728580.

The previous prime is 47799567728537. The next prime is 47799567728683. The reversal of 47799567728581 is 18582776599774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47624366883681 + 175200844900 = 6901041^2 + 418570^2 .

It is a cyclic number.

It is not a de Polignac number, because 47799567728581 - 2³⁹ = 47249811914693 is a prime.

It is a super-2 number, since 2×47799567728581² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47799567729581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23899783864290 + 23899783864291.

It is an arithmetic number, because the mean of its divisors is an integer number (23899783864291).

Almost surely, 2^{47799567728581} is an apocalyptic number.

It is an amenable number.

47799567728581 is a deficient number, since it is larger than the sum of its proper divisors (1).

47799567728581 is an equidigital number, since it uses as much as digits as its factorization.

47799567728581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14936140800, while the sum is 85.

The spelling of 47799567728581 in words is "forty-seven trillion, seven hundred ninety-nine billion, five hundred sixty-seven million, seven hundred twenty-eight thousand, five hundred eighty-one".