71156250816 has 168 divisors, whose sum is σ = 219164489280. Its totient is φ = 20315570688.

The previous prime is 71156250773. The next prime is 71156250829. The reversal of 71156250816 is 61805265117.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 25240255 + ... + 25243073.

Almost surely, 2^71156250816 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 71156250816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109582244640).

71156250816 is an abundant number, since it is smaller than the sum of its proper divisors (148008238464).

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

71156250816 is a wasteful number, since it uses less digits than its factorization.

71156250816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5531 (or 5514 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 42.

The spelling of 71156250816 in words is "seventy-one billion, one hundred fifty-six million, two hundred fifty thousand, eight hundred sixteen".