71115662120 has 16 divisors (see below), whose sum is σ = 160010239860. Its totient is φ = 28446264832.

The previous prime is 71115662099. The next prime is 71115662129. The reversal of 71115662120 is 2126651117.

It can be written as a sum of positive squares in 2 ways, for example, as 68172165604 + 2943496516 = 261098^2 + 54254^2 .

It is not an unprimeable number, because it can be changed into a prime (71115662129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 888945737 + ... + 888945816.

Almost surely, 2^71115662120 is an apocalyptic number.

It is an amenable number.

71115662120 is an abundant number, since it is smaller than the sum of its proper divisors (88894577740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71115662120 is a wasteful number, since it uses less digits than its factorization.

71115662120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777891564 (or 1777891560 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 71115662120 in words is "seventy-one billion, one hundred fifteen million, six hundred sixty-two thousand, one hundred twenty".