401211036405 has 64 divisors (see below), whose sum is σ = 725482137600. Its totient is φ = 210318888960.

The previous prime is 401211036389. The next prime is 401211036409. The reversal of 401211036405 is 504630112104.

It is a happy number.

401211036405 is a `hidden beast` number, since 4 + 0 + 1 + 2 + 1 + 10 + 3 + 640 + 5 = 666.

It is not a de Polignac number, because 401211036405 - 2⁴ = 401211036389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401211036409) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11833237 + ... + 11867093.

It is an arithmetic number, because the mean of its divisors is an integer number (11335658400).

Almost surely, 2^401211036405 is an apocalyptic number.

401211036405 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

401211036405 is a deficient number, since it is larger than the sum of its proper divisors (324271101195).

401211036405 is a wasteful number, since it uses less digits than its factorization.

401211036405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35371 (or 35365 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 401211036405 its reverse (504630112104), we get a palindrome (905841148509).

The spelling of 401211036405 in words is "four hundred one billion, two hundred eleven million, thirty-six thousand, four hundred five".