481681879561 has 2 divisors, whose sum is σ = 481681879562. Its totient is φ = 481681879560.

The previous prime is 481681879529. The next prime is 481681879577. The reversal of 481681879561 is 165978186184.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 474052905225 + 7628974336 = 688515^2 + 87344^2 .

It is a cyclic number.

It is not a de Polignac number, because 481681879561 - 2⁵ = 481681879529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 481681879493 and 481681879502.

It is not a weakly prime, because it can be changed into another prime (481681879661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240840939780 + 240840939781.

It is an arithmetic number, because the mean of its divisors is an integer number (240840939781).

Almost surely, 2^481681879561 is an apocalyptic number.

It is an amenable number.

481681879561 is a deficient number, since it is larger than the sum of its proper divisors (1).

481681879561 is an equidigital number, since it uses as much as digits as its factorization.

481681879561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23224320, while the sum is 64.

The spelling of 481681879561 in words is "four hundred eighty-one billion, six hundred eighty-one million, eight hundred seventy-nine thousand, five hundred sixty-one".