71278726794878 has 16 divisors (see below), whose sum is σ = 106931384917200. Its totient is φ = 35634932070336.

The previous prime is 71278726794871. The next prime is 71278726794931. The reversal of 71278726794878 is 87849762787217.

It is a junction number, because it is equal to n+sod(n) for n = 71278726794796 and 71278726794805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71278726794871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1193938673 + ... + 1193998371.

It is an arithmetic number, because the mean of its divisors is an integer number (6683211557325).

Almost surely, 2^{71278726794878} is an apocalyptic number.

71278726794878 is a deficient number, since it is larger than the sum of its proper divisors (35652658122322).

71278726794878 is a wasteful number, since it uses less digits than its factorization.

71278726794878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123931.

The product of its digits is 7434878976, while the sum is 83.

The spelling of 71278726794878 in words is "seventy-one trillion, two hundred seventy-eight billion, seven hundred twenty-six million, seven hundred ninety-four thousand, eight hundred seventy-eight".