71121252156 has 96 divisors (see below), whose sum is σ = 177955481088. Its totient is φ = 22029127680.

The previous prime is 71121252127. The next prime is 71121252161. The reversal of 71121252156 is 65125212117.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6056811 + ... + 6068541.

It is an arithmetic number, because the mean of its divisors is an integer number (1853702928).

Almost surely, 2^71121252156 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 71121252156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88977740544).

71121252156 is an abundant number, since it is smaller than the sum of its proper divisors (106834228932).

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

71121252156 is a wasteful number, since it uses less digits than its factorization.

71121252156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12131 (or 12129 counting only the distinct ones).

The product of its digits is 8400, while the sum is 33.

The spelling of 71121252156 in words is "seventy-one billion, one hundred twenty-one million, two hundred fifty-two thousand, one hundred fifty-six".