77730241247813 has 24 divisors (see below), whose sum is σ = 99185951932704. Its totient is φ = 60234383613600.

The previous prime is 77730241247807. The next prime is 77730241247831. The reversal of 77730241247813 is 31874214203777.

It is a happy number.

It is not a de Polignac number, because 77730241247813 - 2⁴² = 73332194736709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77730241247873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 398277995 + ... + 398473112.

It is an arithmetic number, because the mean of its divisors is an integer number (4132747997196).

Almost surely, 2^{77730241247813} is an apocalyptic number.

It is an amenable number.

77730241247813 is a deficient number, since it is larger than the sum of its proper divisors (21455710684891).

77730241247813 is a wasteful number, since it uses less digits than its factorization.

77730241247813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796751313 (or 796751306 counting only the distinct ones).

The product of its (nonzero) digits is 11063808, while the sum is 56.

The spelling of 77730241247813 in words is "seventy-seven trillion, seven hundred thirty billion, two hundred forty-one million, two hundred forty-seven thousand, eight hundred thirteen".