77243274725 has 12 divisors (see below), whose sum is σ = 95794543236. Its totient is φ = 61786308480.

The previous prime is 77243274721. The next prime is 77243274743. The reversal of 77243274725 is 52747234277.

It can be written as a sum of positive squares in 6 ways, for example, as 104878081 + 77138396644 = 10241^2 + 277738^2 .

It is not a de Polignac number, because 77243274725 - 2² = 77243274721 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 (77243274721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14672 + ... + 393321.

It is an arithmetic number, because the mean of its divisors is an integer number (7982878603).

Almost surely, 2^77243274725 is an apocalyptic number.

It is an amenable number.

77243274725 is a deficient number, since it is larger than the sum of its proper divisors (18551268511).

77243274725 is a wasteful number, since it uses less digits than its factorization.

77243274725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415576 (or 415571 counting only the distinct ones).

The product of its digits is 4609920, while the sum is 50.

The spelling of 77243274725 in words is "seventy-seven billion, two hundred forty-three million, two hundred seventy-four thousand, seven hundred twenty-five".