481664551 has 6 divisors (see below), whose sum is σ = 503517560. Its totient is φ = 460722108.

The previous prime is 481664537. The next prime is 481664581. The reversal of 481664551 is 155466184.

It is not a de Polignac number, because 481664551 - 2²⁵ = 448110119 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 (481664531) 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 5 ways as a sum of consecutive naturals, for example, 454731 + ... + 455788.

Almost surely, 2^481664551 is an apocalyptic number.

481664551 is a deficient number, since it is larger than the sum of its proper divisors (21853009).

481664551 is an equidigital number, since it uses as much as digits as its factorization.

481664551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910565 (or 910542 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The square root of 481664551 is about 21946.8574287983. The cubic root of 481664551 is about 783.8775530474.

The spelling of 481664551 in words is "four hundred eighty-one million, six hundred sixty-four thousand, five hundred fifty-one".