485451891 has 6 divisors (see below), whose sum is σ = 701208300. Its totient is φ = 323634588.

The previous prime is 485451887. The next prime is 485452001. The reversal of 485451891 is 198154584.

It is a happy number.

485451891 is a `hidden beast` number, since 4 + 8 + 545 + 18 + 91 = 666.

It is not a de Polignac number, because 485451891 - 2² = 485451887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (485451871) 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, 26969541 + ... + 26969558.

It is an arithmetic number, because the mean of its divisors is an integer number (116868050).

Almost surely, 2^485451891 is an apocalyptic number.

485451891 is a deficient number, since it is larger than the sum of its proper divisors (215756409).

485451891 is a wasteful number, since it uses less digits than its factorization.

485451891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53939105 (or 53939102 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The square root of 485451891 is about 22032.9728134902. The cubic root of 485451891 is about 785.9267408364.

The spelling of 485451891 in words is "four hundred eighty-five million, four hundred fifty-one thousand, eight hundred ninety-one".