71178608640 has 448 divisors, whose sum is σ = 245666361600. Its totient is φ = 17539006464.

The previous prime is 71178608581. The next prime is 71178608651. The reversal of 71178608640 is 4680687117.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 71178608640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100392606 + ... + 100393314.

Almost surely, 2^71178608640 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 71178608640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122833180800).

71178608640 is an abundant number, since it is smaller than the sum of its proper divisors (174487752960).

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

71178608640 is a wasteful number, since it uses less digits than its factorization.

71178608640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805 (or 781 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 48.

The spelling of 71178608640 in words is "seventy-one billion, one hundred seventy-eight million, six hundred eight thousand, six hundred forty".