400644602804 has 24 divisors (see below), whose sum is σ = 703198950720. Its totient is φ = 199731115584.

The previous prime is 400644602791. The next prime is 400644602879. The reversal of 400644602804 is 408206446004.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3215777 + ... + 3338039.

It is an arithmetic number, because the mean of its divisors is an integer number (29299956280).

Almost surely, 2^400644602804 is an apocalyptic number.

It is an amenable number.

400644602804 is a deficient number, since it is larger than the sum of its proper divisors (302554347916).

400644602804 is a wasteful number, since it uses less digits than its factorization.

400644602804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124679 (or 124677 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 38.

The spelling of 400644602804 in words is "four hundred billion, six hundred forty-four million, six hundred two thousand, eight hundred four".