40991588736 has 64 divisors (see below), whose sum is σ = 124438759680. Its totient is φ = 11711881728.

The previous prime is 40991588713. The next prime is 40991588773. The reversal of 40991588736 is 63788519904.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-3 number, since 3×40991588736³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40991588736.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7622236 + ... + 7627611.

It is an arithmetic number, because the mean of its divisors is an integer number (1944355620).

Almost surely, 2^40991588736 is an apocalyptic number.

It is an amenable number.

40991588736 is an abundant number, since it is smaller than the sum of its proper divisors (83447170944).

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

40991588736 is a wasteful number, since it uses less digits than its factorization.

40991588736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15249871 (or 15249859 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 40991588736 in words is "forty billion, nine hundred ninety-one million, five hundred eighty-eight thousand, seven hundred thirty-six".