47418537281 has 2 divisors, whose sum is σ = 47418537282. Its totient is φ = 47418537280.

The previous prime is 47418537241. The next prime is 47418537379. The reversal of 47418537281 is 18273581474.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25951599025 + 21466938256 = 161095^2 + 146516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47418537281 is a prime.

It is a super-2 number, since 2×47418537281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47418537211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23709268640 + 23709268641.

It is an arithmetic number, because the mean of its divisors is an integer number (23709268641).

Almost surely, 2^47418537281 is an apocalyptic number.

It is an amenable number.

47418537281 is a deficient number, since it is larger than the sum of its proper divisors (1).

47418537281 is an equidigital number, since it uses as much as digits as its factorization.

47418537281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1505280, while the sum is 50.

The spelling of 47418537281 in words is "forty-seven billion, four hundred eighteen million, five hundred thirty-seven thousand, two hundred eighty-one".