40641730236 has 120 divisors (see below), whose sum is σ = 109832021376. Its totient is φ = 13091207040.

The previous prime is 40641730229. The next prime is 40641730237. The reversal of 40641730236 is 63203714604.

It is a happy number.

40641730236 is a `hidden beast` number, since 4 + 0 + 6 + 417 + 3 + 0 + 236 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 40641730236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40641730237) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8002530 + ... + 8007606.

Almost surely, 2^40641730236 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 40641730236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54916010688).

40641730236 is an abundant number, since it is smaller than the sum of its proper divisors (69190291140).

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

40641730236 is a wasteful number, since it uses less digits than its factorization.

40641730236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5921 (or 5910 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The spelling of 40641730236 in words is "forty billion, six hundred forty-one million, seven hundred thirty thousand, two hundred thirty-six".