71978976418 has 8 divisors (see below), whose sum is σ = 108139573440. Its totient is φ = 35932451940.

The previous prime is 71978976403. The next prime is 71978976449. The reversal of 71978976418 is 81467987917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×71978976418² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28516558 + ... + 28519081.

It is an arithmetic number, because the mean of its divisors is an integer number (13517446680).

Almost surely, 2^71978976418 is an apocalyptic number.

71978976418 is a deficient number, since it is larger than the sum of its proper divisors (36160597022).

71978976418 is a wasteful number, since it uses less digits than its factorization.

71978976418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57036272.

The product of its digits is 42674688, while the sum is 67.

The spelling of 71978976418 in words is "seventy-one billion, nine hundred seventy-eight million, nine hundred seventy-six thousand, four hundred eighteen".