42404535011561 has 8 divisors (see below), whose sum is σ = 42457077967104. Its totient is φ = 42351994230640.

The previous prime is 42404535011539. The next prime is 42404535011567. The reversal of 42404535011561 is 16511053540424.

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-42404535011561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42404535011567) 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, 40386350 + ... + 41423016.

It is an arithmetic number, because the mean of its divisors is an integer number (5307134745888).

Almost surely, 2^{42404535011561} is an apocalyptic number.

It is an amenable number.

42404535011561 is a deficient number, since it is larger than the sum of its proper divisors (52542955543).

42404535011561 is a wasteful number, since it uses less digits than its factorization.

42404535011561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087311.

The product of its (nonzero) digits is 288000, while the sum is 41.

Adding to 42404535011561 its reverse (16511053540424), we get a palindrome (58915588551985).

The spelling of 42404535011561 in words is "forty-two trillion, four hundred four billion, five hundred thirty-five million, eleven thousand, five hundred sixty-one".