40661823544 has 16 divisors (see below), whose sum is σ = 80253599400. Its totient is φ = 19260863712.

The previous prime is 40661823509. The next prime is 40661823557. The reversal of 40661823544 is 44532816604.

It is a self number, because there is not a number n which added to its sum of digits gives 40661823544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133755847 + ... + 133756150.

Almost surely, 2^40661823544 is an apocalyptic number.

It is an amenable number.

40661823544 is a deficient number, since it is larger than the sum of its proper divisors (39591775856).

40661823544 is a wasteful number, since it uses less digits than its factorization.

40661823544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267512022 (or 267512018 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 40661823544 in words is "forty billion, six hundred sixty-one million, eight hundred twenty-three thousand, five hundred forty-four".