23523638545 has 16 divisors (see below), whose sum is σ = 30845357568. Its totient is φ = 17079891840.

The previous prime is 23523638543. The next prime is 23523638557. The reversal of 23523638545 is 54583632532.

It is a happy number.

It is not a de Polignac number, because 23523638545 - 2¹ = 23523638543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23523638495 and 23523638504.

It is not an unprimeable number, because it can be changed into a prime (23523638543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318924 + ... + 385693.

It is an arithmetic number, because the mean of its divisors is an integer number (1927834848).

Almost surely, 2^23523638545 is an apocalyptic number.

It is an amenable number.

23523638545 is a deficient number, since it is larger than the sum of its proper divisors (7321719023).

23523638545 is a wasteful number, since it uses less digits than its factorization.

23523638545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705240.

The product of its digits is 2592000, while the sum is 46.

The spelling of 23523638545 in words is "twenty-three billion, five hundred twenty-three million, six hundred thirty-eight thousand, five hundred forty-five".