78328827171 has 32 divisors (see below), whose sum is σ = 132706129920. Its totient is φ = 44730340992.

The previous prime is 78328827167. The next prime is 78328827197. The reversal of 78328827171 is 17172882387.

78328827171 is a `hidden beast` number, since 78 + 328 + 82 + 7 + 171 = 666.

It is not a de Polignac number, because 78328827171 - 2² = 78328827167 is a prime.

It is a super-2 number, since 2×78328827171² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78328827121) 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, 160086 + ... + 426948.

It is an arithmetic number, because the mean of its divisors is an integer number (4147066560).

Almost surely, 2^78328827171 is an apocalyptic number.

78328827171 is a deficient number, since it is larger than the sum of its proper divisors (54377302749).

78328827171 is a wasteful number, since it uses less digits than its factorization.

78328827171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268432 (or 268426 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 54.

The spelling of 78328827171 in words is "seventy-eight billion, three hundred twenty-eight million, eight hundred twenty-seven thousand, one hundred seventy-one".