71473131552 has 96 divisors (see below), whose sum is σ = 198901894464. Its totient is φ = 22394880000.

The previous prime is 71473131539. The next prime is 71473131553. The reversal of 71473131552 is 25513137417.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 71473131552.

It is not an unprimeable number, because it can be changed into a prime (71473131553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1296552 + ... + 1350552.

It is an arithmetic number, because the mean of its divisors is an integer number (2071894734).

Almost surely, 2^71473131552 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 71473131552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99450947232).

71473131552 is an abundant number, since it is smaller than the sum of its proper divisors (127428762912).

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

71473131552 is a wasteful number, since it uses less digits than its factorization.

71473131552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54842 (or 54834 counting only the distinct ones).

The product of its digits is 88200, while the sum is 39.

Adding to 71473131552 its reverse (25513137417), we get a palindrome (96986268969).

The spelling of 71473131552 in words is "seventy-one billion, four hundred seventy-three million, one hundred thirty-one thousand, five hundred fifty-two".