71978976404 has 6 divisors (see below), whose sum is σ = 125963208714. Its totient is φ = 35989488200.

The previous prime is 71978976403. The next prime is 71978976449. The reversal of 71978976404 is 40467987917.

It can be written as a sum of positive squares in only one way, i.e., 61108828804 + 10870147600 = 247202^2 + 104260^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71978976403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8997372047 + ... + 8997372054.

It is an arithmetic number, because the mean of its divisors is an integer number (20993868119).

Almost surely, 2^71978976404 is an apocalyptic number.

It is an amenable number.

71978976404 is a deficient number, since it is larger than the sum of its proper divisors (53984232310).

71978976404 is a wasteful number, since it uses less digits than its factorization.

71978976404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17994744105 (or 17994744103 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 62.

The spelling of 71978976404 in words is "seventy-one billion, nine hundred seventy-eight million, nine hundred seventy-six thousand, four hundred four".