40663448657999 has 4 divisors (see below), whose sum is σ = 40693326285120. Its totient is φ = 40633571030880.

The previous prime is 40663448657941. The next prime is 40663448658031. The reversal of 40663448657999 is 99975684436604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40663448657999 - 2¹⁶ = 40663448592463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40663448657399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14938811519 + ... + 14938814240.

It is an arithmetic number, because the mean of its divisors is an integer number (10173331571280).

Almost surely, 2^{40663448657999} is an apocalyptic number.

40663448657999 is a deficient number, since it is larger than the sum of its proper divisors (29877627121).

40663448657999 is a wasteful number, since it uses less digits than its factorization.

40663448657999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29877627120.

The product of its (nonzero) digits is 8465264640, while the sum is 80.

The spelling of 40663448657999 in words is "forty trillion, six hundred sixty-three billion, four hundred forty-eight million, six hundred fifty-seven thousand, nine hundred ninety-nine".