23551517061647 has 4 divisors (see below), whose sum is σ = 23551528149600. Its totient is φ = 23551505973696.

The previous prime is 23551517061629. The next prime is 23551517061649. The reversal of 23551517061647 is 74616071515532.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23551517061647 - 2²⁶ = 23551449952783 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 (23551517061649) 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, 1248503 + ... + 6975800.

It is an arithmetic number, because the mean of its divisors is an integer number (5887882037400).

Almost surely, 2^{23551517061647} is an apocalyptic number.

23551517061647 is a deficient number, since it is larger than the sum of its proper divisors (11087953).

23551517061647 is an equidigital number, since it uses as much as digits as its factorization.

23551517061647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11087952.

The product of its (nonzero) digits is 5292000, while the sum is 53.

The spelling of 23551517061647 in words is "twenty-three trillion, five hundred fifty-one billion, five hundred seventeen million, sixty-one thousand, six hundred forty-seven".