40144073643 has 6 divisors (see below), whose sum is σ = 57985884164. Its totient is φ = 26762715756.

The previous prime is 40144073609. The next prime is 40144073647. The reversal of 40144073643 is 34637044104.

40144073643 is a `hidden beast` number, since 4 + 0 + 1 + 4 + 4 + 0 + 7 + 3 + 643 = 666.

It is not a de Polignac number, because 40144073643 - 2¹⁷ = 40143942571 is a prime.

It is a super-2 number, since 2×40144073643² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40144073598 and 40144073607.

It is not an unprimeable number, because it can be changed into a prime (40144073647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2230226305 + ... + 2230226322.

Almost surely, 2^40144073643 is an apocalyptic number.

40144073643 is a deficient number, since it is larger than the sum of its proper divisors (17841810521).

40144073643 is a wasteful number, since it uses less digits than its factorization.

40144073643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4460452633 (or 4460452630 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 36.

The spelling of 40144073643 in words is "forty billion, one hundred forty-four million, seventy-three thousand, six hundred forty-three".