77438883477 has 16 divisors (see below), whose sum is σ = 106770156480. Its totient is φ = 49895843712.

The previous prime is 77438883461. The next prime is 77438883503.

77438883477 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 77438883477 - 2⁴ = 77438883461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77438883377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3623952 + ... + 3645257.

It is an arithmetic number, because the mean of its divisors is an integer number (6673134780).

Almost surely, 2^77438883477 is an apocalyptic number.

It is an amenable number.

77438883477 is a deficient number, since it is larger than the sum of its proper divisors (29331273003).

77438883477 is a wasteful number, since it uses less digits than its factorization.

77438883477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7269332.

The product of its digits is 177020928, while the sum is 66.

The spelling of 77438883477 in words is "seventy-seven billion, four hundred thirty-eight million, eight hundred eighty-three thousand, four hundred seventy-seven".