23178224257949 has 2 divisors, whose sum is σ = 23178224257950. Its totient is φ = 23178224257948.

The previous prime is 23178224257897. The next prime is 23178224258017. The reversal of 23178224257949 is 94975242287132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23103740023225 + 74484234724 = 4806635^2 + 272918^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23178224257949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23178224256949) 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, 11589112128974 + 11589112128975.

It is an arithmetic number, because the mean of its divisors is an integer number (11589112128975).

Almost surely, 2^{23178224257949} is an apocalyptic number.

It is an amenable number.

23178224257949 is a deficient number, since it is larger than the sum of its proper divisors (1).

23178224257949 is an equidigital number, since it uses as much as digits as its factorization.

23178224257949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121927680, while the sum is 65.

The spelling of 23178224257949 in words is "twenty-three trillion, one hundred seventy-eight billion, two hundred twenty-four million, two hundred fifty-seven thousand, nine hundred forty-nine".