10040435561 has 8 divisors (see below), whose sum is σ = 10813582920. Its totient is φ = 9267403392.

The previous prime is 10040435557. The next prime is 10040435579. The reversal of 10040435561 is 16553404001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9211225 + 10031224336 = 3035^2 + 100156^2 .

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

It is not a de Polignac number, because 10040435561 - 2² = 10040435557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10040435521) 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, 258341 + ... + 294653.

It is an arithmetic number, because the mean of its divisors is an integer number (1351697865).

Almost surely, 2^10040435561 is an apocalyptic number.

It is an amenable number.

10040435561 is a deficient number, since it is larger than the sum of its proper divisors (773147359).

10040435561 is a wasteful number, since it uses less digits than its factorization.

10040435561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57595.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 10040435561 its reverse (16553404001), we get a palindrome (26593839562).

The spelling of 10040435561 in words is "ten billion, forty million, four hundred thirty-five thousand, five hundred sixty-one".