71218289280 has 128 divisors (see below), whose sum is σ = 236878369920. Its totient is φ = 18165813248.

The previous prime is 71218289267. The next prime is 71218289281. The reversal of 71218289280 is 8298281217.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is not an unprimeable number, because it can be changed into a prime (71218289281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 762207 + ... + 850526.

It is an arithmetic number, because the mean of its divisors is an integer number (1850612265).

Almost surely, 2^71218289280 is an apocalyptic number.

It is an amenable number.

71218289280 is an abundant number, since it is smaller than the sum of its proper divisors (165660080640).

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

71218289280 is a wasteful number, since it uses less digits than its factorization.

71218289280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612778 (or 1612766 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 48.

The spelling of 71218289280 in words is "seventy-one billion, two hundred eighteen million, two hundred eighty-nine thousand, two hundred eighty".