78841276711978 has 16 divisors (see below), whose sum is σ = 131127965442720. Its totient is φ = 35249453074800.

The previous prime is 78841276711961. The next prime is 78841276711987. The reversal of 78841276711978 is 87911767214887.

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, 29374542888 + ... + 29374545571.

It is an arithmetic number, because the mean of its divisors is an integer number (8195497840170).

Almost surely, 2^{78841276711978} is an apocalyptic number.

78841276711978 is a deficient number, since it is larger than the sum of its proper divisors (52286688730742).

78841276711978 is a wasteful number, since it uses less digits than its factorization.

78841276711978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58749088533.

The product of its digits is 531062784, while the sum is 76.

The spelling of 78841276711978 in words is "seventy-eight trillion, eight hundred forty-one billion, two hundred seventy-six million, seven hundred eleven thousand, nine hundred seventy-eight".