455854949721 has 6 divisors (see below), whose sum is σ = 658457149610. Its totient is φ = 303903299808.

The previous prime is 455854949717. The next prime is 455854949747. The reversal of 455854949721 is 127949458554.

455854949721 is a `hidden beast` number, since 4 + 5 + 5 + 85 + 49 + 497 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 313752338496 + 142102611225 = 560136^2 + 376965^2 .

It is not a de Polignac number, because 455854949721 - 2² = 455854949717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (455854949791) 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, 25325274976 + ... + 25325274993.

Almost surely, 2^455854949721 is an apocalyptic number.

It is an amenable number.

455854949721 is a deficient number, since it is larger than the sum of its proper divisors (202602199889).

455854949721 is a wasteful number, since it uses less digits than its factorization.

455854949721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50650549975 (or 50650549972 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 63.

The spelling of 455854949721 in words is "four hundred fifty-five billion, eight hundred fifty-four million, nine hundred forty-nine thousand, seven hundred twenty-one".