40143743865 has 24 divisors (see below), whose sum is σ = 69761395080. Its totient is φ = 21354948864.

The previous prime is 40143743863. The next prime is 40143743869. The reversal of 40143743865 is 56834734104.

40143743865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 406909584 + 39736834281 = 20172^2 + 199341^2 .

It is not a de Polignac number, because 40143743865 - 2¹ = 40143743863 is a prime.

It is a super-2 number, since 2×40143743865² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 40143743865.

It is not an unprimeable number, because it can be changed into a prime (40143743863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1129132 + ... + 1164141.

It is an arithmetic number, because the mean of its divisors is an integer number (2906724795).

Almost surely, 2^40143743865 is an apocalyptic number.

40143743865 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40143743865 is a deficient number, since it is larger than the sum of its proper divisors (29617651215).

40143743865 is a wasteful number, since it uses less digits than its factorization.

40143743865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293673 (or 2293670 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 40143743865 in words is "forty billion, one hundred forty-three million, seven hundred forty-three thousand, eight hundred sixty-five".