40663398971 has 16 divisors (see below), whose sum is σ = 45000701088. Its totient is φ = 36500025600.

The previous prime is 40663398961. The next prime is 40663398991. The reversal of 40663398971 is 17989336604.

It is a cyclic number.

It is not a de Polignac number, because 40663398971 - 2⁶ = 40663398907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40663398911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 847751 + ... + 894431.

It is an arithmetic number, because the mean of its divisors is an integer number (2812543818).

Almost surely, 2^40663398971 is an apocalyptic number.

40663398971 is a deficient number, since it is larger than the sum of its proper divisors (4337302117).

40663398971 is a wasteful number, since it uses less digits than its factorization.

40663398971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48542.

The product of its (nonzero) digits is 5878656, while the sum is 56.

The spelling of 40663398971 in words is "forty billion, six hundred sixty-three million, three hundred ninety-eight thousand, nine hundred seventy-one".