71947927412 has 6 divisors (see below), whose sum is σ = 125908872978. Its totient is φ = 35973963704.

The previous prime is 71947927369. The next prime is 71947927439. The reversal of 71947927412 is 21472974917.

It can be written as a sum of positive squares in only one way, i.e., 71795058916 + 152868496 = 267946^2 + 12364^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8993490923 + ... + 8993490930.

It is an arithmetic number, because the mean of its divisors is an integer number (20984812163).

Almost surely, 2^71947927412 is an apocalyptic number.

It is an amenable number.

71947927412 is a deficient number, since it is larger than the sum of its proper divisors (53960945566).

71947927412 is a wasteful number, since it uses less digits than its factorization.

71947927412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17986981857 (or 17986981855 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 53.

The spelling of 71947927412 in words is "seventy-one billion, nine hundred forty-seven million, nine hundred twenty-seven thousand, four hundred twelve".