47838341817557 has 2 divisors, whose sum is σ = 47838341817558. Its totient is φ = 47838341817556.

The previous prime is 47838341817449. The next prime is 47838341817647. The reversal of 47838341817557 is 75571814383874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46091593668241 + 1746748149316 = 6789079^2 + 1321646^2 .

It is a cyclic number.

It is not a de Polignac number, because 47838341817557 - 2¹⁰ = 47838341816533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47838341817257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23919170908778 + 23919170908779.

It is an arithmetic number, because the mean of its divisors is an integer number (23919170908779).

Almost surely, 2^{47838341817557} is an apocalyptic number.

It is an amenable number.

47838341817557 is a deficient number, since it is larger than the sum of its proper divisors (1).

47838341817557 is an equidigital number, since it uses as much as digits as its factorization.

47838341817557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 632217600, while the sum is 71.

The spelling of 47838341817557 in words is "forty-seven trillion, eight hundred thirty-eight billion, three hundred forty-one million, eight hundred seventeen thousand, five hundred fifty-seven".