71481412836 has 36 divisors (see below), whose sum is σ = 180735473100. Its totient is φ = 23821026048.

The previous prime is 71481412831. The next prime is 71481412843. The reversal of 71481412836 is 63821418417.

It can be written as a sum of positive squares in 2 ways, for example, as 13376310336 + 58105102500 = 115656^2 + 241050^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 71481412791 and 71481412800.

It is not an unprimeable number, because it can be changed into a prime (71481412831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111241 + ... + 394128.

Almost surely, 2^71481412836 is an apocalyptic number.

It is an amenable number.

71481412836 is an abundant number, since it is smaller than the sum of its proper divisors (109254060264).

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

71481412836 is a wasteful number, since it uses less digits than its factorization.

71481412836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509308 (or 509303 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The spelling of 71481412836 in words is "seventy-one billion, four hundred eighty-one million, four hundred twelve thousand, eight hundred thirty-six".