40001655204 has 144 divisors (see below), whose sum is σ = 117676016640. Its totient is φ = 11220327360.

The previous prime is 40001655203. The next prime is 40001655247. The reversal of 40001655204 is 40255610004.

40001655204 is a `hidden beast` number, since 4 + 0 + 0 + 0 + 1 + 655 + 2 + 0 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (40001655203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15803419 + ... + 15805949.

It is an arithmetic number, because the mean of its divisors is an integer number (817194560).

Almost surely, 2^40001655204 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 40001655204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58838008320).

40001655204 is an abundant number, since it is smaller than the sum of its proper divisors (77674361436).

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

40001655204 is a wasteful number, since it uses less digits than its factorization.

40001655204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670 (or 3665 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 40001655204 in words is "forty billion, one million, six hundred fifty-five thousand, two hundred four".