40768561 has 8 divisors (see below), whose sum is σ = 42176960. Its totient is φ = 39376368.

The previous prime is 40768543. The next prime is 40768571. The reversal of 40768561 is 16586704.

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-40768561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

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 40768561.

It is not an unprimeable number, because it can be changed into a prime (40768571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1180 + ... + 9106.

It is an arithmetic number, because the mean of its divisors is an integer number (5272120).

Almost surely, 2^40768561 is an apocalyptic number.

It is an amenable number.

40768561 is a deficient number, since it is larger than the sum of its proper divisors (1408399).

40768561 is a wasteful number, since it uses less digits than its factorization.

40768561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8103.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 40768561 is about 6385.0263116138. The cubic root of 40768561 is about 344.1716766353.

The spelling of 40768561 in words is "forty million, seven hundred sixty-eight thousand, five hundred sixty-one".