40561511579 has 2 divisors, whose sum is σ = 40561511580. Its totient is φ = 40561511578.

The previous prime is 40561511491. The next prime is 40561511597. The reversal of 40561511579 is 97511516504.

Together with next prime (40561511597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40561511579 - 2³² = 36266544283 is a prime.

It is not a weakly prime, because it can be changed into another prime (40561511279) 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 as a sum of consecutive naturals, namely, 20280755789 + 20280755790.

It is an arithmetic number, because the mean of its divisors is an integer number (20280755790).

Almost surely, 2^40561511579 is an apocalyptic number.

40561511579 is a deficient number, since it is larger than the sum of its proper divisors (1).

40561511579 is an equidigital number, since it uses as much as digits as its factorization.

40561511579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 44.

The spelling of 40561511579 in words is "forty billion, five hundred sixty-one million, five hundred eleven thousand, five hundred seventy-nine".