77225277727 has 4 divisors (see below), whose sum is σ = 83165683720. Its totient is φ = 71284871736.

The previous prime is 77225277709. The next prime is 77225277737. The reversal of 77225277727 is 72777252277.

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

It is not a de Polignac number, because 77225277727 - 2⁷ = 77225277599 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 (77225277707) 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, 2970202977 + ... + 2970203002.

It is an arithmetic number, because the mean of its divisors is an integer number (20791420930).

Almost surely, 2^77225277727 is an apocalyptic number.

77225277727 is a deficient number, since it is larger than the sum of its proper divisors (5940405993).

77225277727 is a wasteful number, since it uses less digits than its factorization.

77225277727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940405992.

The product of its digits is 9411920, while the sum is 55.

The spelling of 77225277727 in words is "seventy-seven billion, two hundred twenty-five million, two hundred seventy-seven thousand, seven hundred twenty-seven".