400078518044 has 6 divisors (see below), whose sum is σ = 700137406584. Its totient is φ = 200039259020.

The previous prime is 400078517987. The next prime is 400078518139. The reversal of 400078518044 is 440815870004.

It is a junction number, because it is equal to n+sod(n) for n = 400078517992 and 400078518010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50009814752 + ... + 50009814759.

It is an arithmetic number, because the mean of its divisors is an integer number (116689567764).

Almost surely, 2^400078518044 is an apocalyptic number.

It is an amenable number.

400078518044 is a deficient number, since it is larger than the sum of its proper divisors (300058888540).

400078518044 is a wasteful number, since it uses less digits than its factorization.

400078518044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100019629515 (or 100019629513 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 41.

The spelling of 400078518044 in words is "four hundred billion, seventy-eight million, five hundred eighteen thousand, forty-four".