40539644879877 has 36 divisors (see below), whose sum is σ = 69315719736172. Its totient is φ = 22679521603200.

The previous prime is 40539644879819. The next prime is 40539644879939. The reversal of 40539644879877 is 77897844693504.

40539644879877 is a `hidden beast` number, since 4 + 0 + 5 + 3 + 9 + 64 + 487 + 9 + 8 + 77 = 666.

40539644879877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 15254094111201 + 25285550768676 = 3905649^2 + 5028474^2 .

It is not a de Polignac number, because 40539644879877 - 2⁶ = 40539644879813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40539644879796 and 40539644879805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40539644879477) 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 35 ways as a sum of consecutive naturals, for example, 1431773824 + ... + 1431802137.

Almost surely, 2^{40539644879877} is an apocalyptic number.

It is an amenable number.

40539644879877 is a deficient number, since it is larger than the sum of its proper divisors (28776074856295).

40539644879877 is a wasteful number, since it uses less digits than its factorization.

40539644879877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863576002 (or 2863575988 counting only the distinct ones).

The product of its (nonzero) digits is 10241925120, while the sum is 81.

The spelling of 40539644879877 in words is "forty trillion, five hundred thirty-nine billion, six hundred forty-four million, eight hundred seventy-nine thousand, eight hundred seventy-seven".