23451859549 has 2 divisors, whose sum is σ = 23451859550. Its totient is φ = 23451859548.

The previous prime is 23451859523. The next prime is 23451859603. The reversal of 23451859549 is 94595815432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20633311449 + 2818548100 = 143643^2 + 53090^2 .

It is a cyclic number.

It is not a de Polignac number, because 23451859549 - 2⁹ = 23451859037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23451859549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23451859349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11725929774 + 11725929775.

It is an arithmetic number, because the mean of its divisors is an integer number (11725929775).

Almost surely, 2^23451859549 is an apocalyptic number.

It is an amenable number.

23451859549 is a deficient number, since it is larger than the sum of its proper divisors (1).

23451859549 is an equidigital number, since it uses as much as digits as its factorization.

23451859549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776000, while the sum is 55.

The spelling of 23451859549 in words is "twenty-three billion, four hundred fifty-one million, eight hundred fifty-nine thousand, five hundred forty-nine".