477891636749 has 4 divisors (see below), whose sum is σ = 478614620220. Its totient is φ = 477168653280.

The previous prime is 477891636743. The next prime is 477891636751. The reversal of 477891636749 is 947636198774.

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 321736259524 + 156155377225 = 567218^2 + 395165^2 .

It is a cyclic number.

It is not a de Polignac number, because 477891636749 - 2²⁴ = 477874859533 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 (477891636743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361490744 + ... + 361492065.

It is an arithmetic number, because the mean of its divisors is an integer number (119653655055).

Almost surely, 2^477891636749 is an apocalyptic number.

It is an amenable number.

477891636749 is a deficient number, since it is larger than the sum of its proper divisors (722983471).

477891636749 is an equidigital number, since it uses as much as digits as its factorization.

477891636749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722983470.

The product of its digits is 384072192, while the sum is 71.

The spelling of 477891636749 in words is "four hundred seventy-seven billion, eight hundred ninety-one million, six hundred thirty-six thousand, seven hundred forty-nine".