61423420161 has 8 divisors (see below), whose sum is σ = 82049278144. Its totient is φ = 40873254480.

The previous prime is 61423420141. The next prime is 61423420183. The reversal of 61423420161 is 16102432416.

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

It is not a de Polignac number, because 61423420161 - 2⁷ = 61423420033 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 (61423420111) 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, 18921181 + ... + 18924426.

It is an arithmetic number, because the mean of its divisors is an integer number (10256159768).

Almost surely, 2^61423420161 is an apocalyptic number.

It is an amenable number.

61423420161 is a deficient number, since it is larger than the sum of its proper divisors (20625857983).

61423420161 is a wasteful number, since it uses less digits than its factorization.

61423420161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37846151.

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 61423420161 its reverse (16102432416), we get a palindrome (77525852577).

The spelling of 61423420161 in words is "sixty-one billion, four hundred twenty-three million, four hundred twenty thousand, one hundred sixty-one".