71551063240 has 32 divisors (see below), whose sum is σ = 165340973880. Its totient is φ = 27846899712.

The previous prime is 71551063201. The next prime is 71551063261. The reversal of 71551063240 is 4236015517.

It can be written as a sum of positive squares in 4 ways, for example, as 70650703204 + 900360036 = 265802^2 + 30006^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71551063196 and 71551063205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24171177 + ... + 24174136.

Almost surely, 2^71551063240 is an apocalyptic number.

It is an amenable number.

71551063240 is an abundant number, since it is smaller than the sum of its proper divisors (93789910640).

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

71551063240 is a wasteful number, since it uses less digits than its factorization.

71551063240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48345361 (or 48345357 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

Adding to 71551063240 its reverse (4236015517), we get a palindrome (75787078757).

The spelling of 71551063240 in words is "seventy-one billion, five hundred fifty-one million, sixty-three thousand, two hundred forty".