180571453969 has 9 divisors (see below), whose sum is σ = 187025529873. Its totient is φ = 174332953872.

The previous prime is 180571453943. The next prime is 180571453987. The reversal of 180571453969 is 969354175081.

The square root of 180571453969 is 424937.

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 22396619025 + 158174834944 = 149655^2 + 397712^2 .

It is not a de Polignac number, because 180571453969 - 2²⁵ = 180537899537 is a prime.

It is a super-2 number, since 2×180571453969² (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 (180571453169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12315847 + ... + 12330499.

Almost surely, 2^180571453969 is an apocalyptic number.

180571453969 is the 424937-th square number.

180571453969 is the 212469-th centered octagonal number.

It is an amenable number.

180571453969 is a deficient number, since it is larger than the sum of its proper divisors (6454075904).

180571453969 is an frugal number, since it uses more digits than its factorization.

180571453969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29364 (or 14682 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 58.

The spelling of 180571453969 in words is "one hundred eighty billion, five hundred seventy-one million, four hundred fifty-three thousand, nine hundred sixty-nine".