23551661465263 has 4 divisors (see below), whose sum is σ = 23553165322408. Its totient is φ = 23550157608120.

The previous prime is 23551661465239. The next prime is 23551661465273. The reversal of 23551661465263 is 36256416615532.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23551661465263 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 (23551661465273) 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, 751905081 + ... + 751936402.

It is an arithmetic number, because the mean of its divisors is an integer number (5888291330602).

Almost surely, 2^{23551661465263} is an apocalyptic number.

23551661465263 is a deficient number, since it is larger than the sum of its proper divisors (1503857145).

23551661465263 is a wasteful number, since it uses less digits than its factorization.

23551661465263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503857144.

The product of its digits is 23328000, while the sum is 55.

The spelling of 23551661465263 in words is "twenty-three trillion, five hundred fifty-one billion, six hundred sixty-one million, four hundred sixty-five thousand, two hundred sixty-three".