655453779201 has 27 divisors (see below), whose sum is σ = 1025246324739. Its totient is φ = 403336741392.

The previous prime is 655453779173. The next prime is 655453779221. The reversal of 655453779201 is 102977354556.

It is a happy number.

The square root of 655453779201 is 809601.

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

655453779201 is a `hidden beast` number, since 6 + 5 + 545 + 3 + 7 + 7 + 92 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 96960618225 + 558493160976 = 311385^2 + 747324^2 .

It is not a de Polignac number, because 655453779201 - 2¹⁵ = 655453746433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (655453779221) 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 26 ways as a sum of consecutive naturals, for example, 31564060 + ... + 31584818.

Almost surely, 2^655453779201 is an apocalyptic number.

655453779201 is the 809601-st square number.

655453779201 is the 404801-st centered octagonal number.

It is an amenable number.

655453779201 is a deficient number, since it is larger than the sum of its proper divisors (369792545538).

655453779201 is an frugal number, since it uses more digits than its factorization.

655453779201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41550 (or 20775 counting only the distinct ones).

The product of its (nonzero) digits is 7938000, while the sum is 54.

The spelling of 655453779201 in words is "six hundred fifty-five billion, four hundred fifty-three million, seven hundred seventy-nine thousand, two hundred one".