40120420543 has 8 divisors (see below), whose sum is σ = 46827482112. Its totient is φ = 33657252216.

The previous prime is 40120420537. The next prime is 40120420601. The reversal of 40120420543 is 34502402104.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40120420543 - 2¹⁷ = 40120289471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40120420943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60972955 + ... + 60973612.

It is an arithmetic number, because the mean of its divisors is an integer number (5853435264).

Almost surely, 2^40120420543 is an apocalyptic number.

40120420543 is a deficient number, since it is larger than the sum of its proper divisors (6707061569).

40120420543 is a wasteful number, since it uses less digits than its factorization.

40120420543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121946621.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 40120420543 its reverse (34502402104), we get a palindrome (74622822647).

The spelling of 40120420543 in words is "forty billion, one hundred twenty million, four hundred twenty thousand, five hundred forty-three".