477545924921 has 4 divisors (see below), whose sum is σ = 514280226852. Its totient is φ = 440811622992.

The previous prime is 477545924917. The next prime is 477545924959. The reversal of 477545924921 is 129429545774.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 216592506025 + 260953418896 = 465395^2 + 510836^2 .

It is not a de Polignac number, because 477545924921 - 2² = 477545924917 is a prime.

It is a super-2 number, since 2×477545924921² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (477545924021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18367150946 + ... + 18367150971.

It is an arithmetic number, because the mean of its divisors is an integer number (128570056713).

Almost surely, 2^477545924921 is an apocalyptic number.

It is an amenable number.

477545924921 is a deficient number, since it is larger than the sum of its proper divisors (36734301931).

477545924921 is a wasteful number, since it uses less digits than its factorization.

477545924921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36734301930.

The product of its digits is 25401600, while the sum is 59.

The spelling of 477545924921 in words is "four hundred seventy-seven billion, five hundred forty-five million, nine hundred twenty-four thousand, nine hundred twenty-one".