7728500870077 has 8 divisors (see below), whose sum is σ = 8323712407640. Its totient is φ = 7133390971200.

The previous prime is 7728500870009. The next prime is 7728500870117. The reversal of 7728500870077 is 7700780058277.

It can be written as a sum of positive squares in 4 ways, for example, as 519861188196 + 7208639681881 = 721014^2 + 2684891^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7728500870077 - 2⁷ = 7728500869949 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 (7728500840077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25251702 + ... + 25555927.

It is an arithmetic number, because the mean of its divisors is an integer number (1040464050955).

Almost surely, 2^{7728500870077} is an apocalyptic number.

It is an amenable number.

7728500870077 is a deficient number, since it is larger than the sum of its proper divisors (595211537563).

7728500870077 is a wasteful number, since it uses less digits than its factorization.

7728500870077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50819343.

The product of its (nonzero) digits is 10756480, while the sum is 58.

The spelling of 7728500870077 in words is "seven trillion, seven hundred twenty-eight billion, five hundred million, eight hundred seventy thousand, seventy-seven".