23153578549 has 2 divisors, whose sum is σ = 23153578550. Its totient is φ = 23153578548.

The previous prime is 23153578457. The next prime is 23153578571. The reversal of 23153578549 is 94587535132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11776156324 + 11377422225 = 108518^2 + 106665^2 .

It is a cyclic number.

It is not a de Polignac number, because 23153578549 - 2⁷ = 23153578421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23153578496 and 23153578505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23153578649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11576789274 + 11576789275.

It is an arithmetic number, because the mean of its divisors is an integer number (11576789275).

Almost surely, 2^23153578549 is an apocalyptic number.

It is an amenable number.

23153578549 is a deficient number, since it is larger than the sum of its proper divisors (1).

23153578549 is an equidigital number, since it uses as much as digits as its factorization.

23153578549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536000, while the sum is 52.

The spelling of 23153578549 in words is "twenty-three billion, one hundred fifty-three million, five hundred seventy-eight thousand, five hundred forty-nine".