71162780072 has 32 divisors (see below), whose sum is σ = 140294089800. Its totient is φ = 33791251200.

The previous prime is 71162780069. The next prime is 71162780107. The reversal of 71162780072 is 27008726117.

It can be written as a sum of positive squares in 4 ways, for example, as 16867255876 + 54295524196 = 129874^2 + 233014^2 .

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, 2500079 + ... + 2528382.

Almost surely, 2^71162780072 is an apocalyptic number.

It is an amenable number.

71162780072 is a deficient number, since it is larger than the sum of its proper divisors (69131309728).

71162780072 is a wasteful number, since it uses less digits than its factorization.

71162780072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5028557 (or 5028553 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 41.

The spelling of 71162780072 in words is "seventy-one billion, one hundred sixty-two million, seven hundred eighty thousand, seventy-two".