405936179081 has 2 divisors, whose sum is σ = 405936179082. Its totient is φ = 405936179080.

The previous prime is 405936179059. The next prime is 405936179087. The reversal of 405936179081 is 180971639504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 396320611600 + 9615567481 = 629540^2 + 98059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405936179081 is a prime.

It is a super-2 number, since 2×405936179081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (405936179087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202968089540 + 202968089541.

It is an arithmetic number, because the mean of its divisors is an integer number (202968089541).

Almost surely, 2^405936179081 is an apocalyptic number.

It is an amenable number.

405936179081 is a deficient number, since it is larger than the sum of its proper divisors (1).

405936179081 is an equidigital number, since it uses as much as digits as its factorization.

405936179081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 405936179081 in words is "four hundred five billion, nine hundred thirty-six million, one hundred seventy-nine thousand, eighty-one".