77548247313 has 4 divisors (see below), whose sum is σ = 103397663088. Its totient is φ = 51698831540.

The previous prime is 77548247291. The next prime is 77548247327. The reversal of 77548247313 is 31374284577.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77548247313 - 2²⁰ = 77547198737 is a prime.

It is a super-3 number, since 3×77548247313³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (77548247333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12924707883 + ... + 12924707888.

It is an arithmetic number, because the mean of its divisors is an integer number (25849415772).

Almost surely, 2^77548247313 is an apocalyptic number.

It is an amenable number.

77548247313 is a deficient number, since it is larger than the sum of its proper divisors (25849415775).

77548247313 is a wasteful number, since it uses less digits than its factorization.

77548247313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25849415774.

The product of its digits is 3951360, while the sum is 51.

The spelling of 77548247313 in words is "seventy-seven billion, five hundred forty-eight million, two hundred forty-seven thousand, three hundred thirteen".