40120605243 has 48 divisors (see below), whose sum is σ = 61006233600. Its totient is φ = 25358743872.

The previous prime is 40120605193. The next prime is 40120605313. The reversal of 40120605243 is 34250602104.

40120605243 is a `hidden beast` number, since 4 + 0 + 12 + 0 + 605 + 2 + 43 = 666.

It is not a de Polignac number, because 40120605243 - 2²¹ = 40118508091 is a prime.

It is a super-4 number, since 4×40120605243⁴ (a number of 44 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (40120605043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18720630 + ... + 18722772.

It is an arithmetic number, because the mean of its divisors is an integer number (1270963200).

Almost surely, 2^40120605243 is an apocalyptic number.

40120605243 is a deficient number, since it is larger than the sum of its proper divisors (20885628357).

40120605243 is a wasteful number, since it uses less digits than its factorization.

40120605243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928 (or 2925 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The spelling of 40120605243 in words is "forty billion, one hundred twenty million, six hundred five thousand, two hundred forty-three".