78785753827247 has 4 divisors (see below), whose sum is σ = 79961660600856. Its totient is φ = 77609847053640.

The previous prime is 78785753827237. The next prime is 78785753827283. The reversal of 78785753827247 is 74272835758787.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78785753827247 - 2¹⁰ = 78785753826223 is a prime.

It is a super-2 number, since 2×78785753827247² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78785753827237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587953386704 + ... + 587953386837.

It is an arithmetic number, because the mean of its divisors is an integer number (19990415150214).

Almost surely, 2^{78785753827247} is an apocalyptic number.

78785753827247 is a deficient number, since it is larger than the sum of its proper divisors (1175906773609).

78785753827247 is a wasteful number, since it uses less digits than its factorization.

78785753827247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175906773608.

The product of its digits is 10326220800, while the sum is 80.

The spelling of 78785753827247 in words is "seventy-eight trillion, seven hundred eighty-five billion, seven hundred fifty-three million, eight hundred twenty-seven thousand, two hundred forty-seven".