40504587181 has 2 divisors, whose sum is σ = 40504587182. Its totient is φ = 40504587180.

The previous prime is 40504587133. The next prime is 40504587203. The reversal of 40504587181 is 18178540504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38429329156 + 2075258025 = 196034^2 + 45555^2 .

It is a cyclic number.

It is not a de Polignac number, because 40504587181 - 2¹⁵ = 40504554413 is a prime.

It is a super-2 number, since 2×40504587181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40504584181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20252293590 + 20252293591.

It is an arithmetic number, because the mean of its divisors is an integer number (20252293591).

Almost surely, 2^40504587181 is an apocalyptic number.

It is an amenable number.

40504587181 is a deficient number, since it is larger than the sum of its proper divisors (1).

40504587181 is an equidigital number, since it uses as much as digits as its factorization.

40504587181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 179200, while the sum is 43.

The spelling of 40504587181 in words is "forty billion, five hundred four million, five hundred eighty-seven thousand, one hundred eighty-one".