400905533872 has 40 divisors (see below), whose sum is σ = 793357096896. Its totient is φ = 196169035776.

The previous prime is 400905533839. The next prime is 400905533893. The reversal of 400905533872 is 278335509004.

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 7 ways as a sum of consecutive naturals, for example, 11003878 + ... + 11040250.

Almost surely, 2^400905533872 is an apocalyptic number.

It is an amenable number.

400905533872 is a deficient number, since it is larger than the sum of its proper divisors (392451563024).

400905533872 is a wasteful number, since it uses less digits than its factorization.

400905533872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51085 (or 51079 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 400905533872 in words is "four hundred billion, nine hundred five million, five hundred thirty-three thousand, eight hundred seventy-two".