401664727811 has 2 divisors, whose sum is σ = 401664727812. Its totient is φ = 401664727810.

The previous prime is 401664727703. The next prime is 401664727819. The reversal of 401664727811 is 118727466104.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401664727811 is a prime.

It is a super-2 number, since 2×401664727811² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401664727819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200832363905 + 200832363906.

It is an arithmetic number, because the mean of its divisors is an integer number (200832363906).

Almost surely, 2^401664727811 is an apocalyptic number.

401664727811 is a deficient number, since it is larger than the sum of its proper divisors (1).

401664727811 is an equidigital number, since it uses as much as digits as its factorization.

401664727811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 401664727811 in words is "four hundred one billion, six hundred sixty-four million, seven hundred twenty-seven thousand, eight hundred eleven".