71010721720 has 16 divisors (see below), whose sum is σ = 159774123960. Its totient is φ = 28404288672.

The previous prime is 71010721703. The next prime is 71010721739. The reversal of 71010721720 is 2712701017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887633982 + ... + 887634061.

Almost surely, 2^71010721720 is an apocalyptic number.

It is an amenable number.

71010721720 is an abundant number, since it is smaller than the sum of its proper divisors (88763402240).

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

71010721720 is a wasteful number, since it uses less digits than its factorization.

71010721720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775268054 (or 1775268050 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 28.

The spelling of 71010721720 in words is "seventy-one billion, ten million, seven hundred twenty-one thousand, seven hundred twenty".