23628780505 has 16 divisors (see below), whose sum is σ = 32751765504. Its totient is φ = 16173710080.

The previous prime is 23628780503. The next prime is 23628780521. The reversal of 23628780505 is 50508782632.

It is a happy number.

It is not a de Polignac number, because 23628780505 - 2¹ = 23628780503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23628780503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12634777 + ... + 12636646.

It is an arithmetic number, because the mean of its divisors is an integer number (2046985344).

Almost surely, 2^23628780505 is an apocalyptic number.

It is an amenable number.

23628780505 is a deficient number, since it is larger than the sum of its proper divisors (9122984999).

23628780505 is a wasteful number, since it uses less digits than its factorization.

23628780505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25271456.

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 23628780505 in words is "twenty-three billion, six hundred twenty-eight million, seven hundred eighty thousand, five hundred five".