23545872545 has 16 divisors (see below), whose sum is σ = 30432305232. Its totient is φ = 17385553920.

The previous prime is 23545872523. The next prime is 23545872557. The reversal of 23545872545 is 54527854532.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 526610704 + 23019261841 = 22948^2 + 151721^2 .

It is not a de Polignac number, because 23545872545 - 2¹⁶ = 23545807009 is a prime.

It is a super-2 number, since 2×23545872545² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23545872493 and 23545872502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660785 + ... + 695505.

It is an arithmetic number, because the mean of its divisors is an integer number (1902019077).

Almost surely, 2^23545872545 is an apocalyptic number.

It is an amenable number.

23545872545 is a deficient number, since it is larger than the sum of its proper divisors (6886432687).

23545872545 is a wasteful number, since it uses less digits than its factorization.

23545872545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45172.

The product of its digits is 6720000, while the sum is 50.

The spelling of 23545872545 in words is "twenty-three billion, five hundred forty-five million, eight hundred seventy-two thousand, five hundred forty-five".