42540436564405 has 32 divisors (see below), whose sum is σ = 58077685008000. Its totient is φ = 29653641775872.

The previous prime is 42540436564403. The next prime is 42540436564421. The reversal of 42540436564405 is 50446563404524.

It is a cyclic number.

It is not a de Polignac number, because 42540436564405 - 2¹ = 42540436564403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42540436564403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61834255 + ... + 62518444.

It is an arithmetic number, because the mean of its divisors is an integer number (1814927656500).

Almost surely, 2^{42540436564405} is an apocalyptic number.

It is an amenable number.

42540436564405 is a deficient number, since it is larger than the sum of its proper divisors (15537248443595).

42540436564405 is a wasteful number, since it uses less digits than its factorization.

42540436564405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124353013.

The product of its (nonzero) digits is 27648000, while the sum is 52.

Adding to 42540436564405 its reverse (50446563404524), we get a palindrome (92986999968929).

The spelling of 42540436564405 in words is "forty-two trillion, five hundred forty billion, four hundred thirty-six million, five hundred sixty-four thousand, four hundred five".