77552479871 has 4 divisors (see below), whose sum is σ = 77553415872. Its totient is φ = 77551543872.

The previous prime is 77552479867. The next prime is 77552479889. The reversal of 77552479871 is 17897425577.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17897425577 = 523 ⋅34220699.

It is a cyclic number.

It is not a de Polignac number, because 77552479871 - 2² = 77552479867 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 (77552479831) 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, 330191 + ... + 513936.

It is an arithmetic number, because the mean of its divisors is an integer number (19388353968).

Almost surely, 2^77552479871 is an apocalyptic number.

77552479871 is a deficient number, since it is larger than the sum of its proper divisors (936001).

77552479871 is an equidigital number, since it uses as much as digits as its factorization.

77552479871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936000.

The product of its digits is 34574400, while the sum is 62.

The spelling of 77552479871 in words is "seventy-seven billion, five hundred fifty-two million, four hundred seventy-nine thousand, eight hundred seventy-one".