71658667872 has 120 divisors (see below), whose sum is σ = 229904984232. Its totient is φ = 21714739200.

The previous prime is 71658667849. The next prime is 71658667879. The reversal of 71658667872 is 27876685617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71658667879) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1228129 + ... + 1285152.

Almost surely, 2^71658667872 is an apocalyptic number.

71658667872 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

71658667872 is an abundant number, since it is smaller than the sum of its proper divisors (158246316360).

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

71658667872 is a wasteful number, since it uses less digits than its factorization.

71658667872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513314 (or 2513297 counting only the distinct ones).

The product of its digits is 47416320, while the sum is 63.

The spelling of 71658667872 in words is "seventy-one billion, six hundred fifty-eight million, six hundred sixty-seven thousand, eight hundred seventy-two".