23209601545 has 8 divisors (see below), whose sum is σ = 29993946696. Its totient is φ = 17139398016.

The previous prime is 23209601533. The next prime is 23209601551. The reversal of 23209601545 is 54510690232.

It can be written as a sum of positive squares in 4 ways, for example, as 2171839609 + 21037761936 = 46603^2 + 145044^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23209601545 - 2¹⁹ = 23209077257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178535332 + ... + 178535461.

It is an arithmetic number, because the mean of its divisors is an integer number (3749243337).

Almost surely, 2^23209601545 is an apocalyptic number.

It is an amenable number.

23209601545 is a deficient number, since it is larger than the sum of its proper divisors (6784345151).

23209601545 is a wasteful number, since it uses less digits than its factorization.

23209601545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357070811.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 23209601545 in words is "twenty-three billion, two hundred nine million, six hundred one thousand, five hundred forty-five".