40856941161 has 45 divisors (see below), whose sum is σ = 62830847079. Its totient is φ = 26458139376.

The previous prime is 40856941141. The next prime is 40856941243. The reversal of 40856941161 is 16114965804.

The square root of 40856941161 is 202131.

It is a perfect power (a square), and thus also a powerful number.

40856941161 is a `hidden beast` number, since 40 + 8 + 569 + 41 + 1 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 36559352025 + 4297589136 = 191205^2 + 65556^2 .

It is not a de Polignac number, because 40856941161 - 2⁷ = 40856941033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40856941141) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 67309320 + ... + 67309926.

Almost surely, 2^40856941161 is an apocalyptic number.

40856941161 is the 202131-st square number.

40856941161 is the 101066-th centered octagonal number.

It is an amenable number.

40856941161 is a deficient number, since it is larger than the sum of its proper divisors (21973905918).

40856941161 is an frugal number, since it uses more digits than its factorization.

40856941161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 40856941161 in words is "forty billion, eight hundred fifty-six million, nine hundred forty-one thousand, one hundred sixty-one".