40490971538 has 16 divisors (see below), whose sum is σ = 60875225880. Its totient is φ = 20199269376.

The previous prime is 40490971519. The next prime is 40490971663. The reversal of 40490971538 is 83517909404.

40490971538 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 4 ways, for example, as 40480232809 + 10738729 = 201197^2 + 3277^2 .

It is a super-2 number, since 2×40490971538² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2332820 + ... + 2350112.

Almost surely, 2^40490971538 is an apocalyptic number.

40490971538 is a deficient number, since it is larger than the sum of its proper divisors (20384254342).

40490971538 is a wasteful number, since it uses less digits than its factorization.

40490971538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19901.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 40490971538 in words is "forty billion, four hundred ninety million, nine hundred seventy-one thousand, five hundred thirty-eight".