78345232505178 has 32 divisors (see below), whose sum is σ = 156924178587072. Its totient is φ = 26076130080000.

The previous prime is 78345232505159. The next prime is 78345232505191. The reversal of 78345232505178 is 87150523254387.

It is a super-2 number, since 2×78345232505178² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65020825 + ... + 66214787.

It is an arithmetic number, because the mean of its divisors is an integer number (4903880580846).

Almost surely, 2^{78345232505178} is an apocalyptic number.

78345232505178 is an abundant number, since it is smaller than the sum of its proper divisors (78578946081894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78345232505178 is a wasteful number, since it uses less digits than its factorization.

78345232505178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210270.

The product of its (nonzero) digits is 56448000, while the sum is 60.

The spelling of 78345232505178 in words is "seventy-eight trillion, three hundred forty-five billion, two hundred thirty-two million, five hundred five thousand, one hundred seventy-eight".