400865801171 has 32 divisors (see below), whose sum is σ = 464299140096. Its totient is φ = 342497232000.

The previous prime is 400865801143. The next prime is 400865801207. The reversal of 400865801171 is 171108568004.

It is not a de Polignac number, because 400865801171 - 2³⁰ = 399792059347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400865801771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14910281 + ... + 14937141.

It is an arithmetic number, because the mean of its divisors is an integer number (14509348128).

Almost surely, 2^400865801171 is an apocalyptic number.

400865801171 is a deficient number, since it is larger than the sum of its proper divisors (63433338925).

400865801171 is a wasteful number, since it uses less digits than its factorization.

400865801171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27923.

The product of its (nonzero) digits is 53760, while the sum is 41.

The spelling of 400865801171 in words is "four hundred billion, eight hundred sixty-five million, eight hundred one thousand, one hundred seventy-one".