71228503888 has 20 divisors (see below), whose sum is σ = 138802949748. Its totient is φ = 35408387840.

The previous prime is 71228503883. The next prime is 71228503889. The reversal of 71228503888 is 88830582217.

It can be written as a sum of positive squares in 2 ways, for example, as 29060702784 + 42167801104 = 170472^2 + 205348^2 .

It is a super-3 number, since 3×71228503888³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71228503883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12863653 + ... + 12869188.

Almost surely, 2^71228503888 is an apocalyptic number.

It is an amenable number.

71228503888 is a deficient number, since it is larger than the sum of its proper divisors (67574445860).

71228503888 is a wasteful number, since it uses less digits than its factorization.

71228503888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25733022 (or 25733016 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 52.

The spelling of 71228503888 in words is "seventy-one billion, two hundred twenty-eight million, five hundred three thousand, eight hundred eighty-eight".