461451509 has 6 divisors (see below), whose sum is σ = 477483330. Its totient is φ = 445427696.

The previous prime is 461451503. The next prime is 461451521. The reversal of 461451509 is 905154164.

It can be written as a sum of positive squares in 3 ways, for example, as 62331025 + 399120484 = 7895^2 + 19978^2 .

It is not a de Polignac number, because 461451509 - 2¹⁶ = 461385973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461451503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113687 + ... + 117675.

It is an arithmetic number, because the mean of its divisors is an integer number (79580555).

Almost surely, 2^461451509 is an apocalyptic number.

It is an amenable number.

461451509 is a deficient number, since it is larger than the sum of its proper divisors (16031821).

461451509 is an frugal number, since it uses more digits than its factorization.

461451509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8007 (or 4018 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 461451509 is about 21481.4224156595. The cubic root of 461451509 is about 772.7553553720.

The spelling of 461451509 in words is "four hundred sixty-one million, four hundred fifty-one thousand, five hundred nine".