721241274572 has 96 divisors (see below), whose sum is σ = 1590274882560. Its totient is φ = 278628491520.

The previous prime is 721241274569. The next prime is 721241274631. The reversal of 721241274572 is 275472142127.

It is a super-2 number, since 2×721241274572² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2969513 + ... + 3203199.

It is an arithmetic number, because the mean of its divisors is an integer number (16565363360).

Almost surely, 2^721241274572 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 721241274572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (795137441280).

721241274572 is an abundant number, since it is smaller than the sum of its proper divisors (869033607988).

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

721241274572 is a wasteful number, since it uses less digits than its factorization.

721241274572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233911 (or 233909 counting only the distinct ones).

The product of its digits is 439040, while the sum is 44.

The spelling of 721241274572 in words is "seven hundred twenty-one billion, two hundred forty-one million, two hundred seventy-four thousand, five hundred seventy-two".