71821174480 has 160 divisors (see below), whose sum is σ = 196218298368. Its totient is φ = 24175219200.

The previous prime is 71821174433. The next prime is 71821174487. The reversal of 71821174480 is 8447112817.

It is a super-2 number, since 2×71821174480² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71821174487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 570207 + ... + 684673.

Almost surely, 2^71821174480 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 71821174480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98109149184).

71821174480 is an abundant number, since it is smaller than the sum of its proper divisors (124397123888).

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

71821174480 is a wasteful number, since it uses less digits than its factorization.

71821174480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114545 (or 114539 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 43.

The spelling of 71821174480 in words is "seventy-one billion, eight hundred twenty-one million, one hundred seventy-four thousand, four hundred eighty".