178030831969 has 9 divisors (see below), whose sum is σ = 181023385881. Its totient is φ = 175086977520.

The previous prime is 178030831931. The next prime is 178030831981. The reversal of 178030831969 is 969138030871.

The square root of 178030831969 is 421937.

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

It can be written as a sum of positive squares in 4 ways, for example, as 34323120225 + 143707711744 = 185265^2 + 379088^2 .

It is a de Polignac number, because none of the positive numbers 2^k-178030831969 is a prime.

It is a super-2 number, since 2×178030831969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (178030841969) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 25734699 + ... + 25741615.

Almost surely, 2^178030831969 is an apocalyptic number.

178030831969 is the 421937-th square number.

178030831969 is the 210969-th centered octagonal number.

It is an amenable number.

178030831969 is a deficient number, since it is larger than the sum of its proper divisors (2992553912).

178030831969 is an frugal number, since it uses more digits than its factorization.

178030831969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13956 (or 6978 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 178030831969 in words is "one hundred seventy-eight billion, thirty million, eight hundred thirty-one thousand, nine hundred sixty-nine".