723162721072 has 160 divisors (see below), whose sum is σ = 1591862114304. Its totient is φ = 315286732800.

The previous prime is 723162721067. The next prime is 723162721123. The reversal of 723162721072 is 270127261327.

It is a super-2 number, since 2×723162721072² (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, 323272338 + ... + 323274574.

Almost surely, 2^723162721072 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 723162721072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (795931057152).

723162721072 is an abundant number, since it is smaller than the sum of its proper divisors (868699393232).

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

723162721072 is a wasteful number, since it uses less digits than its factorization.

723162721072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787 (or 2781 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 40.

Adding to 723162721072 its reverse (270127261327), we get a palindrome (993289982399).

The spelling of 723162721072 in words is "seven hundred twenty-three billion, one hundred sixty-two million, seven hundred twenty-one thousand, seventy-two".