23571248616409 has 4 divisors (see below), whose sum is σ = 25384421586916. Its totient is φ = 21758075645904.

The previous prime is 23571248616407. The next prime is 23571248616413. The reversal of 23571248616409 is 90461684217532.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2940830563225 + 20630418053184 = 1714885^2 + 4542072^2 .

It is not a de Polignac number, because 23571248616409 - 2¹ = 23571248616407 is a prime.

It is a super-2 number, since 2×23571248616409² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23571248616407) 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, 906586485234 + ... + 906586485259.

It is an arithmetic number, because the mean of its divisors is an integer number (6346105396729).

It is a 1-persistent number, because it is pandigital, but 2⋅23571248616409 = 47142497232818 is not.

Almost surely, 2^{23571248616409} is an apocalyptic number.

It is an amenable number.

23571248616409 is a deficient number, since it is larger than the sum of its proper divisors (1813172970507).

23571248616409 is a wasteful number, since it uses less digits than its factorization.

23571248616409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813172970506.

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 23571248616409 in words is "twenty-three trillion, five hundred seventy-one billion, two hundred forty-eight million, six hundred sixteen thousand, four hundred nine".