176520140449 has 9 divisors (see below), whose sum is σ = 182411481459. Its totient is φ = 170813338080.

The previous prime is 176520140429. The next prime is 176520140633. The reversal of 176520140449 is 944041025671.

The square root of 176520140449 is 420143.

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

It can be written as a sum of positive squares in only one way, i.e., 138038256225 + 38481884224 = 371535^2 + 196168^2 .

It is not a de Polignac number, because 176520140449 - 2⁵ = 176520140417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (176520140429) 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, 13017657 + ... + 13031209.

Almost surely, 2^176520140449 is an apocalyptic number.

176520140449 is the 420143-rd square number.

176520140449 is the 210072-nd centered octagonal number.

It is an amenable number.

176520140449 is a deficient number, since it is larger than the sum of its proper divisors (5891341010).

176520140449 is an frugal number, since it uses more digits than its factorization.

176520140449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27168 (or 13584 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

It can be divided in two parts, 176520 and 140449, that added together give a square (316969 = 563²).

The spelling of 176520140449 in words is "one hundred seventy-six billion, five hundred twenty million, one hundred forty thousand, four hundred forty-nine".