477777777777777 has 16 divisors (see below), whose sum is σ = 646499904515840. Its totient is φ = 313797035221632.

The previous prime is 477777777777739. The next prime is 477777777777793. The reversal of 477777777777777 is 777777777777774.

It is not a de Polignac number, because 477777777777777 - 2²⁶ = 477777710668913 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (477777777777077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1243612777 + ... + 1243996902.

It is an arithmetic number, because the mean of its divisors is an integer number (40406244032240).

Almost surely, 2^{477777777777777} is an apocalyptic number.

It is an amenable number.

477777777777777 is a deficient number, since it is larger than the sum of its proper divisors (168722126738063).

477777777777777 is a wasteful number, since it uses less digits than its factorization.

477777777777777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487610632.

The product of its digits is 2712892291396, while the sum is 102.

The spelling of 477777777777777 in words is "four hundred seventy-seven trillion, seven hundred seventy-seven billion, seven hundred seventy-seven million, seven hundred seventy-seven thousand, seven hundred seventy-seven".