23647706551 has 4 divisors (see below), whose sum is σ = 27025950352. Its totient is φ = 20269462752.

The previous prime is 23647706549. The next prime is 23647706557. The reversal of 23647706551 is 15560774632.

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

It is not a de Polignac number, because 23647706551 - 2¹ = 23647706549 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 (23647706557) 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, 1689121890 + ... + 1689121903.

It is an arithmetic number, because the mean of its divisors is an integer number (6756487588).

Almost surely, 2^23647706551 is an apocalyptic number.

23647706551 is a deficient number, since it is larger than the sum of its proper divisors (3378243801).

23647706551 is an equidigital number, since it uses as much as digits as its factorization.

23647706551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378243800.

The product of its (nonzero) digits is 1058400, while the sum is 46.

The spelling of 23647706551 in words is "twenty-three billion, six hundred forty-seven million, seven hundred six thousand, five hundred fifty-one".