401405388827 has 2 divisors, whose sum is σ = 401405388828. Its totient is φ = 401405388826.

The previous prime is 401405388757. The next prime is 401405388829. The reversal of 401405388827 is 728883504104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401405388827 - 2²⁶ = 401338279963 is a prime.

It is a super-2 number, since 2×401405388827² (a number of 24 digits) contains 22 as substring.

Together with 401405388829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (401405388829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200702694413 + 200702694414.

It is an arithmetic number, because the mean of its divisors is an integer number (200702694414).

Almost surely, 2^401405388827 is an apocalyptic number.

401405388827 is a deficient number, since it is larger than the sum of its proper divisors (1).

401405388827 is an equidigital number, since it uses as much as digits as its factorization.

401405388827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1720320, while the sum is 50.

The spelling of 401405388827 in words is "four hundred one billion, four hundred five million, three hundred eighty-eight thousand, eight hundred twenty-seven".