71905302872 has 16 divisors (see below), whose sum is σ = 145193400240. Its totient is φ = 33187062816.

The previous prime is 71905302863. The next prime is 71905302901. The reversal of 71905302872 is 27820350917.

It is a super-2 number, since 2×71905302872² (a number of 23 digits) contains 22 as substring.

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, 345698468 + ... + 345698675.

It is an arithmetic number, because the mean of its divisors is an integer number (9074587515).

Almost surely, 2^71905302872 is an apocalyptic number.

It is an amenable number.

71905302872 is an abundant number, since it is smaller than the sum of its proper divisors (73288097368).

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

71905302872 is a wasteful number, since it uses less digits than its factorization.

71905302872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691397162 (or 691397158 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 71905302872 in words is "seventy-one billion, nine hundred five million, three hundred two thousand, eight hundred seventy-two".