40041020656 has 80 divisors (see below), whose sum is σ = 95784744384. Its totient is φ = 15790252032.

The previous prime is 40041020633. The next prime is 40041020659. The reversal of 40041020656 is 65602014004.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40041020659) 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 15 ways as a sum of consecutive naturals, for example, 418176 + ... + 504928.

Almost surely, 2^40041020656 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 40041020656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47892372192).

40041020656 is an abundant number, since it is smaller than the sum of its proper divisors (55743723728).

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

40041020656 is a wasteful number, since it uses less digits than its factorization.

40041020656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87098 (or 87092 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 40041020656 in words is "forty billion, forty-one million, twenty thousand, six hundred fifty-six".