71078211216 has 120 divisors (see below), whose sum is σ = 210990685464. Its totient is φ = 22259957760.

The previous prime is 71078211181. The next prime is 71078211221. The reversal of 71078211216 is 61211287017.

It can be written as a sum of positive squares in 4 ways, for example, as 49995171216 + 21083040000 = 223596^2 + 145200^2 .

It is a super-2 number, since 2×71078211216² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1387336 + ... + 1437656.

Almost surely, 2^71078211216 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 71078211216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105495342732).

71078211216 is an abundant number, since it is smaller than the sum of its proper divisors (139912474248).

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

71078211216 is a wasteful number, since it uses less digits than its factorization.

71078211216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50929 (or 50920 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 36.

The spelling of 71078211216 in words is "seventy-one billion, seventy-eight million, two hundred eleven thousand, two hundred sixteen".