40143440969 has 2 divisors, whose sum is σ = 40143440970. Its totient is φ = 40143440968.

The previous prime is 40143440959. The next prime is 40143441007. The reversal of 40143440969 is 96904434104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36595690000 + 3547750969 = 191300^2 + 59563^2 .

It is a cyclic number.

It is not a de Polignac number, because 40143440969 - 2⁸ = 40143440713 is a prime.

It is a super-2 number, since 2×40143440969² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40143440959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20071720484 + 20071720485.

It is an arithmetic number, because the mean of its divisors is an integer number (20071720485).

Almost surely, 2^40143440969 is an apocalyptic number.

It is an amenable number.

40143440969 is a deficient number, since it is larger than the sum of its proper divisors (1).

40143440969 is an equidigital number, since it uses as much as digits as its factorization.

40143440969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 44.

The spelling of 40143440969 in words is "forty billion, one hundred forty-three million, four hundred forty thousand, nine hundred sixty-nine".