400566140181 has 6 divisors (see below), whose sum is σ = 578595535830. Its totient is φ = 267044093448.

The previous prime is 400566140179. The next prime is 400566140269. The reversal of 400566140181 is 181041665004.

400566140181 is a `hidden beast` number, since 4 + 0 + 0 + 566 + 14 + 0 + 1 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 378882105156 + 21684035025 = 615534^2 + 147255^2 .

It is not a de Polignac number, because 400566140181 - 2¹ = 400566140179 is a prime.

It is a super-2 number, since 2×400566140181² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400566140141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22253674446 + ... + 22253674463.

It is an arithmetic number, because the mean of its divisors is an integer number (96432589305).

Almost surely, 2^400566140181 is an apocalyptic number.

It is an amenable number.

400566140181 is a deficient number, since it is larger than the sum of its proper divisors (178029395649).

400566140181 is a wasteful number, since it uses less digits than its factorization.

400566140181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44507348915 (or 44507348912 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 400566140181 in words is "four hundred billion, five hundred sixty-six million, one hundred forty thousand, one hundred eighty-one".