23154616409 has 4 divisors (see below), whose sum is σ = 23155338804. Its totient is φ = 23153894016.

The previous prime is 23154616339. The next prime is 23154616427. The reversal of 23154616409 is 90461645132.

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 13025200384 + 10129416025 = 114128^2 + 100645^2 .

It is a cyclic number.

It is not a de Polignac number, because 23154616409 - 2²⁸ = 22886180953 is a prime.

It is a super-2 number, since 2×23154616409² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23154616109) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 310772 + ... + 378005.

It is an arithmetic number, because the mean of its divisors is an integer number (5788834701).

Almost surely, 2^23154616409 is an apocalyptic number.

It is an amenable number.

23154616409 is a deficient number, since it is larger than the sum of its proper divisors (722395).

23154616409 is an equidigital number, since it uses as much as digits as its factorization.

23154616409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722394.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 23154616409 in words is "twenty-three billion, one hundred fifty-four million, six hundred sixteen thousand, four hundred nine".