71556220704 has 96 divisors (see below), whose sum is σ = 194313240576. Its totient is φ = 23032776960.

The previous prime is 71556220661. The next prime is 71556220727. The reversal of 71556220704 is 40702265517.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1364049 + ... + 1415535.

It is an arithmetic number, because the mean of its divisors is an integer number (2024096256).

Almost surely, 2^71556220704 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 71556220704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97156620288).

71556220704 is an abundant number, since it is smaller than the sum of its proper divisors (122757019872).

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

71556220704 is a wasteful number, since it uses less digits than its factorization.

71556220704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51998 (or 51990 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 39.

The spelling of 71556220704 in words is "seventy-one billion, five hundred fifty-six million, two hundred twenty thousand, seven hundred four".