77725720113 has 32 divisors (see below), whose sum is σ = 107885094912. Its totient is φ = 49743033600.

The previous prime is 77725720057. The next prime is 77725720129. The reversal of 77725720113 is 31102752777.

It is not a de Polignac number, because 77725720113 - 2²⁰ = 77724671537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77725720183) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1831531 + ... + 1873487.

It is an arithmetic number, because the mean of its divisors is an integer number (3371409216).

Almost surely, 2^77725720113 is an apocalyptic number.

It is an amenable number.

77725720113 is a deficient number, since it is larger than the sum of its proper divisors (30159374799).

77725720113 is a wasteful number, since it uses less digits than its factorization.

77725720113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42265.

The product of its (nonzero) digits is 144060, while the sum is 42.

The spelling of 77725720113 in words is "seventy-seven billion, seven hundred twenty-five million, seven hundred twenty thousand, one hundred thirteen".