78345328727727 has 12 divisors (see below), whose sum is σ = 113173963898424. Its totient is φ = 52226301119760.

The previous prime is 78345328727719. The next prime is 78345328727741. The reversal of 78345328727727 is 72772782354387.

78345328727727 is a `hidden beast` number, since 7 + 8 + 3 + 4 + 5 + 328 + 7 + 277 + 27 = 666.

It is not a de Polignac number, because 78345328727727 - 2³ = 78345328727719 is a prime.

It is a super-2 number, since 2×78345328727727² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78345328727707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 326376028 + ... + 326615985.

It is an arithmetic number, because the mean of its divisors is an integer number (9431163658202).

Almost surely, 2^{78345328727727} is an apocalyptic number.

78345328727727 is a deficient number, since it is larger than the sum of its proper divisors (34828635170697).

78345328727727 is a wasteful number, since it uses less digits than its factorization.

78345328727727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653005350 (or 653005347 counting only the distinct ones).

The product of its digits is 1548933120, while the sum is 72.

The spelling of 78345328727727 in words is "seventy-eight trillion, three hundred forty-five billion, three hundred twenty-eight million, seven hundred twenty-seven thousand, seven hundred twenty-seven".