40654543561 has 8 divisors (see below), whose sum is σ = 42800335200. Its totient is φ = 38509359840.

The previous prime is 40654543507. The next prime is 40654543603. The reversal of 40654543561 is 16534545604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40654543561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40654546561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11356 + ... + 285373.

It is an arithmetic number, because the mean of its divisors is an integer number (5350041900).

Almost surely, 2^40654543561 is an apocalyptic number.

It is an amenable number.

40654543561 is a deficient number, since it is larger than the sum of its proper divisors (2145791639).

40654543561 is a wasteful number, since it uses less digits than its factorization.

40654543561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303959.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 40654543561 in words is "forty billion, six hundred fifty-four million, five hundred forty-three thousand, five hundred sixty-one".