71061615572 has 6 divisors (see below), whose sum is σ = 124357827258. Its totient is φ = 35530807784.

The previous prime is 71061615571. The next prime is 71061615577. The reversal of 71061615572 is 27551616017.

It can be written as a sum of positive squares in only one way, i.e., 61026785296 + 10034830276 = 247036^2 + 100174^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71061615571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8882701943 + ... + 8882701950.

It is an arithmetic number, because the mean of its divisors is an integer number (20726304543).

Almost surely, 2^71061615572 is an apocalyptic number.

It is an amenable number.

71061615572 is a deficient number, since it is larger than the sum of its proper divisors (53296211686).

71061615572 is a wasteful number, since it uses less digits than its factorization.

71061615572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17765403897 (or 17765403895 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 71061615572 in words is "seventy-one billion, sixty-one million, six hundred fifteen thousand, five hundred seventy-two".