40869531999 has 12 divisors (see below), whose sum is σ = 59051009056. Its totient is φ = 27238397472.

The previous prime is 40869531991. The next prime is 40869532013. The reversal of 40869531999 is 99913596804.

40869531999 is a `hidden beast` number, since 4 + 0 + 8 + 6 + 9 + 531 + 9 + 99 = 666.

It is not a de Polignac number, because 40869531999 - 2³ = 40869531991 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 (40869531991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 630487 + ... + 692280.

Almost surely, 2^40869531999 is an apocalyptic number.

40869531999 is a deficient number, since it is larger than the sum of its proper divisors (18181477057).

40869531999 is a wasteful number, since it uses less digits than its factorization.

40869531999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326206 (or 1326203 counting only the distinct ones).

The product of its (nonzero) digits is 18895680, while the sum is 63.

The spelling of 40869531999 in words is "forty billion, eight hundred sixty-nine million, five hundred thirty-one thousand, nine hundred ninety-nine".