401233255566 has 64 divisors (see below), whose sum is σ = 962816633856. Its totient is φ = 109845129600.

The previous prime is 401233255537. The next prime is 401233255601. The reversal of 401233255566 is 665552332104.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4934545 + ... + 5015196.

It is an arithmetic number, because the mean of its divisors is an integer number (15044009904).

Almost surely, 2^401233255566 is an apocalyptic number.

401233255566 is an abundant number, since it is smaller than the sum of its proper divisors (561583378290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401233255566 is a wasteful number, since it uses less digits than its factorization.

401233255566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9949817.

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 401233255566 in words is "four hundred one billion, two hundred thirty-three million, two hundred fifty-five thousand, five hundred sixty-six".