40205007543 has 16 divisors (see below), whose sum is σ = 53761874400. Its totient is φ = 26725839360.

The previous prime is 40205007517. The next prime is 40205007547. The reversal of 40205007543 is 34570050204.

It is not a de Polignac number, because 40205007543 - 2²⁸ = 39936572087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40205007543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40205007547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1712323 + ... + 1735643.

It is an arithmetic number, because the mean of its divisors is an integer number (3360117150).

Almost surely, 2^40205007543 is an apocalyptic number.

40205007543 is a deficient number, since it is larger than the sum of its proper divisors (13556866857).

40205007543 is a wasteful number, since it uses less digits than its factorization.

40205007543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24962.

The product of its (nonzero) digits is 16800, while the sum is 30.

Adding to 40205007543 its reverse (34570050204), we get a palindrome (74775057747).

The spelling of 40205007543 in words is "forty billion, two hundred five million, seven thousand, five hundred forty-three".