16958393455249 has 3 divisors (see below), whose sum is σ = 16958397573307. Its totient is φ = 16958389337192.

The previous prime is 16958393455231. The next prime is 16958393455279. The reversal of 16958393455249 is 94255439385961.

The square root of 16958393455249 is 4118057.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 228919187025 + 16729474268224 = 478455^2 + 4090168^2 .

It is not a de Polignac number, because 16958393455249 - 2¹⁹ = 16958392930961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16958393455279) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2059029 + ... + 6177085.

Almost surely, 2^{16958393455249} is an apocalyptic number.

16958393455249 is the 4118057-th square number.

16958393455249 is the 2059029-th centered octagonal number.

It is an amenable number.

16958393455249 is a deficient number, since it is larger than the sum of its proper divisors (4118058).

16958393455249 is an frugal number, since it uses more digits than its factorization.

16958393455249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8236114 (or 4118057 counting only the distinct ones).

The product of its digits is 1259712000, while the sum is 73.

The spelling of 16958393455249 in words is "sixteen trillion, nine hundred fifty-eight billion, three hundred ninety-three million, four hundred fifty-five thousand, two hundred forty-nine".