23377782605 has 4 divisors (see below), whose sum is σ = 28053339132. Its totient is φ = 18702226080.

The previous prime is 23377782599. The next prime is 23377782607. The reversal of 23377782605 is 50628777332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3371660356 + 20006122249 = 58066^2 + 141443^2 .

It is not a de Polignac number, because 23377782605 - 2¹⁸ = 23377520461 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 (23377782607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2337778256 + ... + 2337778265.

It is an arithmetic number, because the mean of its divisors is an integer number (7013334783).

Almost surely, 2^23377782605 is an apocalyptic number.

It is an amenable number.

23377782605 is a deficient number, since it is larger than the sum of its proper divisors (4675556527).

23377782605 is an equidigital number, since it uses as much as digits as its factorization.

23377782605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4675556526.

The product of its (nonzero) digits is 2963520, while the sum is 50.

The spelling of 23377782605 in words is "twenty-three billion, three hundred seventy-seven million, seven hundred eighty-two thousand, six hundred five".