40221736648 has 8 divisors (see below), whose sum is σ = 75415756230. Its totient is φ = 20110868320.

The previous prime is 40221736603. The next prime is 40221736661. The reversal of 40221736648 is 84663712204.

It can be written as a sum of positive squares in only one way, i.e., 24781686084 + 15440050564 = 157422^2 + 124258^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2513858533 + ... + 2513858548.

Almost surely, 2^40221736648 is an apocalyptic number.

It is an amenable number.

40221736648 is a deficient number, since it is larger than the sum of its proper divisors (35194019582).

40221736648 is a wasteful number, since it uses less digits than its factorization.

40221736648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027717087 (or 5027717083 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 40221736648 in words is "forty billion, two hundred twenty-one million, seven hundred thirty-six thousand, six hundred forty-eight".