23481728661393 has 6 divisors (see below), whose sum is σ = 33918052510914. Its totient is φ = 15654485774256.

The previous prime is 23481728661353. The next prime is 23481728661427. The reversal of 23481728661393 is 39316682718432.

It is a happy number.

23481728661393 is a `hidden beast` number, since 2 + 3 + 4 + 8 + 1 + 7 + 2 + 8 + 6 + 613 + 9 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20901647836224 + 2580080825169 = 4571832^2 + 1606263^2 .

It is not a de Polignac number, because 23481728661393 - 2⁹ = 23481728660881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23481728661393.

It is not an unprimeable number, because it can be changed into a prime (23481728661353) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1304540481180 + ... + 1304540481197.

It is an arithmetic number, because the mean of its divisors is an integer number (5653008751819).

Almost surely, 2^{23481728661393} is an apocalyptic number.

It is an amenable number.

23481728661393 is a deficient number, since it is larger than the sum of its proper divisors (10436323849521).

23481728661393 is a wasteful number, since it uses less digits than its factorization.

23481728661393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2609080962383 (or 2609080962380 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The spelling of 23481728661393 in words is "twenty-three trillion, four hundred eighty-one billion, seven hundred twenty-eight million, six hundred sixty-one thousand, three hundred ninety-three".