40939047556 has 81 divisors (see below), whose sum is σ = 83808118191. Its totient is φ = 17481657600.

The previous prime is 40939047553. The next prime is 40939047557. The reversal of 40939047556 is 65574093904.

It is a happy number.

The square root of 40939047556 is 202334.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1490732100 + 39448315456 = 38610^2 + 198616^2 .

It is a super-2 number, since 2×40939047556² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40939047551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 75672646 + ... + 75673186.

Almost surely, 2^40939047556 is an apocalyptic number.

40939047556 is the 202334-th square number.

It is an amenable number.

40939047556 is an abundant number, since it is smaller than the sum of its proper divisors (42869070635).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40939047556 is a wasteful number, since it uses less digits than its factorization.

40939047556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 52.

The spelling of 40939047556 in words is "forty billion, nine hundred thirty-nine million, forty-seven thousand, five hundred fifty-six".