23877788717 has 4 divisors (see below), whose sum is σ = 24523134396. Its totient is φ = 23232443040.

The previous prime is 23877788681. The next prime is 23877788749. The reversal of 23877788717 is 71788777832.

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 20399266276 + 3478522441 = 142826^2 + 58979^2 .

It is a cyclic number.

It is not a de Polignac number, because 23877788717 - 2¹⁸ = 23877526573 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 (23877788797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322672784 + ... + 322672857.

It is an arithmetic number, because the mean of its divisors is an integer number (6130783599).

Almost surely, 2^23877788717 is an apocalyptic number.

It is an amenable number.

23877788717 is a deficient number, since it is larger than the sum of its proper divisors (645345679).

23877788717 is an equidigital number, since it uses as much as digits as its factorization.

23877788717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645345678.

The product of its digits is 51631104, while the sum is 65.

The spelling of 23877788717 in words is "twenty-three billion, eight hundred seventy-seven million, seven hundred eighty-eight thousand, seven hundred seventeen".