78731040678346 has 16 divisors (see below), whose sum is σ = 135142100521344. Its totient is φ = 33698224022544.

The previous prime is 78731040678299. The next prime is 78731040678373. The reversal of 78731040678346 is 64387604013787.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3637534950 + ... + 3637556593.

It is an arithmetic number, because the mean of its divisors is an integer number (8446381282584).

Almost surely, 2^{78731040678346} is an apocalyptic number.

78731040678346 is a deficient number, since it is larger than the sum of its proper divisors (56411059842998).

78731040678346 is a wasteful number, since it uses less digits than its factorization.

78731040678346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7275092325.

The product of its (nonzero) digits is 113799168, while the sum is 64.

The spelling of 78731040678346 in words is "seventy-eight trillion, seven hundred thirty-one billion, forty million, six hundred seventy-eight thousand, three hundred forty-six".