400311965871 has 6 divisors (see below), whose sum is σ = 578228395160. Its totient is φ = 266874643908.

The previous prime is 400311965869. The next prime is 400311965891. The reversal of 400311965871 is 178569113004.

400311965871 is a `hidden beast` number, since 400 + 3 + 1 + 196 + 58 + 7 + 1 = 666.

It is not a de Polignac number, because 400311965871 - 2¹ = 400311965869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400311965891) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 22239553651 + ... + 22239553668.

Almost surely, 2^400311965871 is an apocalyptic number.

400311965871 is a deficient number, since it is larger than the sum of its proper divisors (177916429289).

400311965871 is a wasteful number, since it uses less digits than its factorization.

400311965871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44479107325 (or 44479107322 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 400311965871 in words is "four hundred billion, three hundred eleven million, nine hundred sixty-five thousand, eight hundred seventy-one".