40400040361 has 2 divisors, whose sum is σ = 40400040362. Its totient is φ = 40400040360.

The previous prime is 40400040349. The next prime is 40400040407. The reversal of 40400040361 is 16304000404.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25842170025 + 14557870336 = 160755^2 + 120656^2 .

It is a cyclic number.

It is not a de Polignac number, because 40400040361 - 2¹¹ = 40400038313 is a prime.

It is a super-2 number, since 2×40400040361² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40400047361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20200020180 + 20200020181.

It is an arithmetic number, because the mean of its divisors is an integer number (20200020181).

Almost surely, 2^40400040361 is an apocalyptic number.

It is an amenable number.

40400040361 is a deficient number, since it is larger than the sum of its proper divisors (1).

40400040361 is an equidigital number, since it uses as much as digits as its factorization.

40400040361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 40400040361 its reverse (16304000404), we get a palindrome (56704040765).

The spelling of 40400040361 in words is "forty billion, four hundred million, forty thousand, three hundred sixty-one".