1040311435561 has 4 divisors (see below), whose sum is σ = 1062445721472. Its totient is φ = 1018177149652.

The previous prime is 1040311435549. The next prime is 1040311435571. The reversal of 1040311435561 is 1655341130401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1040311435561 - 2²³ = 1040303046953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1040311435571) 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 3 ways as a sum of consecutive naturals, for example, 11067142885 + ... + 11067142978.

It is an arithmetic number, because the mean of its divisors is an integer number (265611430368).

Almost surely, 2^{1040311435561} is an apocalyptic number.

It is an amenable number.

1040311435561 is a deficient number, since it is larger than the sum of its proper divisors (22134285911).

1040311435561 is an equidigital number, since it uses as much as digits as its factorization.

1040311435561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22134285910.

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 1040311435561 its reverse (1655341130401), we get a palindrome (2695652565962).

The spelling of 1040311435561 in words is "one trillion, forty billion, three hundred eleven million, four hundred thirty-five thousand, five hundred sixty-one".