4781447399081 has 2 divisors, whose sum is σ = 4781447399082. Its totient is φ = 4781447399080.

The previous prime is 4781447399039. The next prime is 4781447399093. The reversal of 4781447399081 is 1809937441874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4765161555625 + 16285843456 = 2182925^2 + 127616^2 .

It is a cyclic number.

It is not a de Polignac number, because 4781447399081 - 2²⁶ = 4781380290217 is a prime.

It is a super-2 number, since 2×4781447399081² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4781447398999 and 4781447399017.

It is not a weakly prime, because it can be changed into another prime (4781447399021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2390723699540 + 2390723699541.

It is an arithmetic number, because the mean of its divisors is an integer number (2390723699541).

Almost surely, 2^{4781447399081} is an apocalyptic number.

It is an amenable number.

4781447399081 is a deficient number, since it is larger than the sum of its proper divisors (1).

4781447399081 is an equidigital number, since it uses as much as digits as its factorization.

4781447399081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48771072, while the sum is 65.

The spelling of 4781447399081 in words is "four trillion, seven hundred eighty-one billion, four hundred forty-seven million, three hundred ninety-nine thousand, eighty-one".