40505517912 has 16 divisors (see below), whose sum is σ = 101263794840. Its totient is φ = 13501839296.

The previous prime is 40505517911. The next prime is 40505517961. The reversal of 40505517912 is 21971550504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40505517911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 843864933 + ... + 843864980.

Almost surely, 2^40505517912 is an apocalyptic number.

It is an amenable number.

40505517912 is an abundant number, since it is smaller than the sum of its proper divisors (60758276928).

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

40505517912 is a wasteful number, since it uses less digits than its factorization.

40505517912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687729922 (or 1687729918 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 39.

The spelling of 40505517912 in words is "forty billion, five hundred five million, five hundred seventeen thousand, nine hundred twelve".