451655234809 has 27 divisors (see below), whose sum is σ = 469981210671. Its totient is φ = 434038709520.

The previous prime is 451655234801. The next prime is 451655234839. The reversal of 451655234809 is 908432556154.

It is a happy number.

The square root of 451655234809 is 672053.

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., 4976879209 + 446678355600 = 70547^2 + 668340^2 .

It is not a de Polignac number, because 451655234809 - 2³ = 451655234801 is a prime.

It is a super-2 number, since 2×451655234809² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (451655234801) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2495332699 + ... + 2495332879.

Almost surely, 2^451655234809 is an apocalyptic number.

451655234809 is the 672053-rd square number.

451655234809 is the 336027-th centered octagonal number.

It is an amenable number.

451655234809 is a deficient number, since it is larger than the sum of its proper divisors (18325975862).

451655234809 is an frugal number, since it uses more digits than its factorization.

451655234809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 52.

The spelling of 451655234809 in words is "four hundred fifty-one billion, six hundred fifty-five million, two hundred thirty-four thousand, eight hundred nine".