23198651549 has 2 divisors, whose sum is σ = 23198651550. Its totient is φ = 23198651548.

The previous prime is 23198651501. The next prime is 23198651573. The reversal of 23198651549 is 94515689132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16014902500 + 7183749049 = 126550^2 + 84757^2 .

It is a cyclic number.

It is not a de Polignac number, because 23198651549 - 2²⁰ = 23197602973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23198651549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23198651249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11599325774 + 11599325775.

It is an arithmetic number, because the mean of its divisors is an integer number (11599325775).

Almost surely, 2^23198651549 is an apocalyptic number.

It is an amenable number.

23198651549 is a deficient number, since it is larger than the sum of its proper divisors (1).

23198651549 is an equidigital number, since it uses as much as digits as its factorization.

23198651549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 53.

The spelling of 23198651549 in words is "twenty-three billion, one hundred ninety-eight million, six hundred fifty-one thousand, five hundred forty-nine".