40661618548 has 24 divisors (see below), whose sum is σ = 73480705760. Its totient is φ = 19675807200.

The previous prime is 40661618519. The next prime is 40661618593. The reversal of 40661618548 is 84581616604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1065678 + ... + 1103173.

Almost surely, 2^40661618548 is an apocalyptic number.

It is an amenable number.

40661618548 is a deficient number, since it is larger than the sum of its proper divisors (32819087212).

40661618548 is a wasteful number, since it uses less digits than its factorization.

40661618548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169007 (or 2169005 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 40661618548 in words is "forty billion, six hundred sixty-one million, six hundred eighteen thousand, five hundred forty-eight".