71002220016 has 160 divisors (see below), whose sum is σ = 225878542848. Its totient is φ = 18715253760.

The previous prime is 71002219999. The next prime is 71002220021. The reversal of 71002220016 is 61002220017.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 71002219974 and 71002220001.

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, 10396795 + ... + 10403621.

Almost surely, 2^71002220016 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 71002220016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112939271424).

71002220016 is an abundant number, since it is smaller than the sum of its proper divisors (154876322832).

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

71002220016 is a wasteful number, since it uses less digits than its factorization.

71002220016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9239 (or 9233 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

Subtracting from 71002220016 its reverse (61002220017), we obtain a palindrome (9999999999).

The spelling of 71002220016 in words is "seventy-one billion, two million, two hundred twenty thousand, sixteen".