71489567820 has 48 divisors (see below), whose sum is σ = 218368136448. Its totient is φ = 17330804160.

The previous prime is 71489567777. The next prime is 71489567839. The reversal of 71489567820 is 2876598417.

It is a super-2 number, since 2×71489567820² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54158104 + ... + 54159423.

It is an arithmetic number, because the mean of its divisors is an integer number (4549336176).

Almost surely, 2^71489567820 is an apocalyptic number.

It is an amenable number.

71489567820 is an abundant number, since it is smaller than the sum of its proper divisors (146878568628).

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

71489567820 is a wasteful number, since it uses less digits than its factorization.

71489567820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108317550 (or 108317548 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 57.

The spelling of 71489567820 in words is "seventy-one billion, four hundred eighty-nine million, five hundred sixty-seven thousand, eight hundred twenty".