40118643841 has 2 divisors, whose sum is σ = 40118643842. Its totient is φ = 40118643840.

The previous prime is 40118643793. The next prime is 40118643871. The reversal of 40118643841 is 14834681104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39497587600 + 621056241 = 198740^2 + 24921^2 .

It is a cyclic number.

It is not a de Polignac number, because 40118643841 - 2¹¹ = 40118641793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40118643794 and 40118643803.

It is not a weakly prime, because it can be changed into another prime (40118643871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20059321920 + 20059321921.

It is an arithmetic number, because the mean of its divisors is an integer number (20059321921).

Almost surely, 2^40118643841 is an apocalyptic number.

It is an amenable number.

40118643841 is a deficient number, since it is larger than the sum of its proper divisors (1).

40118643841 is an equidigital number, since it uses as much as digits as its factorization.

40118643841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728, while the sum is 40.

The spelling of 40118643841 in words is "forty billion, one hundred eighteen million, six hundred forty-three thousand, eight hundred forty-one".