71623863144 has 96 divisors (see below), whose sum is σ = 201255556320. Its totient is φ = 23863968576.

The previous prime is 71623863119. The next prime is 71623863163. The reversal of 71623863144 is 44136832617.

71623863144 is a `hidden beast` number, since 7 + 1 + 6 + 2 + 3 + 8 + 631 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 71623863144.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5197207 + ... + 5210969.

It is an arithmetic number, because the mean of its divisors is an integer number (2096412045).

Almost surely, 2^71623863144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71623863144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100627778160).

71623863144 is an abundant number, since it is smaller than the sum of its proper divisors (129631693176).

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

71623863144 is a wasteful number, since it uses less digits than its factorization.

71623863144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16461 (or 16445 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The spelling of 71623863144 in words is "seventy-one billion, six hundred twenty-three million, eight hundred sixty-three thousand, one hundred forty-four".