71894578016 has 72 divisors (see below), whose sum is σ = 149018540832. Its totient is φ = 34130553600.

The previous prime is 71894578003. The next prime is 71894578027. The reversal of 71894578016 is 61087549817.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1607801 + ... + 1651911.

It is an arithmetic number, because the mean of its divisors is an integer number (2069701956).

Almost surely, 2^71894578016 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 71894578016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74509270416).

71894578016 is an abundant number, since it is smaller than the sum of its proper divisors (77123962816).

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

71894578016 is a wasteful number, since it uses less digits than its factorization.

71894578016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44236 (or 44197 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 56.

The spelling of 71894578016 in words is "seventy-one billion, eight hundred ninety-four million, five hundred seventy-eight thousand, sixteen".