400155466544 has 20 divisors (see below), whose sum is σ = 775320324240. Its totient is φ = 200072802240.

The previous prime is 400155466499. The next prime is 400155466561. The reversal of 400155466544 is 445664551004.

It is a junction number, because it is equal to n+sod(n) for n = 400155466495 and 400155466504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412349 + ... + 985059.

It is an arithmetic number, because the mean of its divisors is an integer number (38766016212).

Almost surely, 2^400155466544 is an apocalyptic number.

It is an amenable number.

400155466544 is a deficient number, since it is larger than the sum of its proper divisors (375164857696).

400155466544 is a wasteful number, since it uses less digits than its factorization.

400155466544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616388 (or 616382 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 44.

The spelling of 400155466544 in words is "four hundred billion, one hundred fifty-five million, four hundred sixty-six thousand, five hundred forty-four".