47242565777881 has 2 divisors, whose sum is σ = 47242565777882. Its totient is φ = 47242565777880.

The previous prime is 47242565777863. The next prime is 47242565777921. The reversal of 47242565777881 is 18877756524274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38123277104025 + 9119288673856 = 6174405^2 + 3019816^2 .

It is a cyclic number.

It is not a de Polignac number, because 47242565777881 - 2¹³ = 47242565769689 is a prime.

It is a super-2 number, since 2×47242565777881² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47242565777821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23621282888940 + 23621282888941.

It is an arithmetic number, because the mean of its divisors is an integer number (23621282888941).

Almost surely, 2^{47242565777881} is an apocalyptic number.

It is an amenable number.

47242565777881 is a deficient number, since it is larger than the sum of its proper divisors (1).

47242565777881 is an equidigital number, since it uses as much as digits as its factorization.

47242565777881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1475174400, while the sum is 73.

The spelling of 47242565777881 in words is "forty-seven trillion, two hundred forty-two billion, five hundred sixty-five million, seven hundred seventy-seven thousand, eight hundred eighty-one".