40579561 has 8 divisors (see below), whose sum is σ = 46872864. Its totient is φ = 34720320.

The previous prime is 40579559. The next prime is 40579577. The reversal of 40579561 is 16597504.

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

It is a cyclic number.

It is not a de Polignac number, because 40579561 - 2¹ = 40579559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40579561.

It is not an unprimeable number, because it can be changed into a prime (40579531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108315 + ... + 108688.

It is an arithmetic number, because the mean of its divisors is an integer number (5859108).

Almost surely, 2^40579561 is an apocalyptic number.

It is an amenable number.

40579561 is a deficient number, since it is larger than the sum of its proper divisors (6293303).

40579561 is a wasteful number, since it uses less digits than its factorization.

40579561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217031.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 40579561 is about 6370.2088662775. The cubic root of 40579561 is about 343.6390012527.

The spelling of 40579561 in words is "forty million, five hundred seventy-nine thousand, five hundred sixty-one".