42305035661 has 4 divisors (see below), whose sum is σ = 48348612192. Its totient is φ = 36261459132.

The previous prime is 42305035651. The next prime is 42305035667. The reversal of 42305035661 is 16653050324.

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 a de Polignac number, because none of the positive numbers 2^k-42305035661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42305035667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3021788255 + ... + 3021788268.

It is an arithmetic number, because the mean of its divisors is an integer number (12087153048).

Almost surely, 2^42305035661 is an apocalyptic number.

It is an amenable number.

42305035661 is a deficient number, since it is larger than the sum of its proper divisors (6043576531).

42305035661 is an equidigital number, since it uses as much as digits as its factorization.

42305035661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6043576530.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 42305035661 its reverse (16653050324), we get a palindrome (58958085985).

The spelling of 42305035661 in words is "forty-two billion, three hundred five million, thirty-five thousand, six hundred sixty-one".