401804445644 has 24 divisors (see below), whose sum is σ = 825328052640. Its totient is φ = 167547799296.

The previous prime is 401804445629. The next prime is 401804445649. The reversal of 401804445644 is 446544408104.

It is a super-2 number, since 2×401804445644² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401804445595 and 401804445604.

It is not an unprimeable number, because it can be changed into a prime (401804445649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193920029 + ... + 193922100.

It is an arithmetic number, because the mean of its divisors is an integer number (34388668860).

Almost surely, 2^401804445644 is an apocalyptic number.

It is an amenable number.

401804445644 is an abundant number, since it is smaller than the sum of its proper divisors (423523606996).

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

401804445644 is a wasteful number, since it uses less digits than its factorization.

401804445644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387842177 (or 387842175 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 44.

The spelling of 401804445644 in words is "four hundred one billion, eight hundred four million, four hundred forty-five thousand, six hundred forty-four".