40664471936 has 96 divisors (see below), whose sum is σ = 89296838400. Its totient is φ = 18431677440.

The previous prime is 40664471933. The next prime is 40664471977. The reversal of 40664471936 is 63917446604.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40664471933) 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 11 ways as a sum of consecutive naturals, for example, 5773505 + ... + 5780543.

It is an arithmetic number, because the mean of its divisors is an integer number (930175400).

Almost surely, 2^40664471936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40664471936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44648419200).

40664471936 is an abundant number, since it is smaller than the sum of its proper divisors (48632366464).

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

40664471936 is a wasteful number, since it uses less digits than its factorization.

40664471936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7448 (or 7425 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 50.

The spelling of 40664471936 in words is "forty billion, six hundred sixty-four million, four hundred seventy-one thousand, nine hundred thirty-six".