724015493881 has 3 divisors (see below), whose sum is σ = 724016344773. Its totient is φ = 724014642990.

The previous prime is 724015493857. The next prime is 724015493893. The reversal of 724015493881 is 188394510427.

The square root of 724015493881 is 850891.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 188394510427 = 16693 ⋅11285839.

It is not a de Polignac number, because 724015493881 - 2¹¹ = 724015491833 is a prime.

It is a super-2 number, since 2×724015493881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724015493821) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 425446 + ... + 1276336.

It is an arithmetic number, because the mean of its divisors is an integer number (241338781591).

Almost surely, 2^724015493881 is an apocalyptic number.

724015493881 is the 850891-st square number.

724015493881 is the 425446-th centered octagonal number.

It is an amenable number.

724015493881 is a deficient number, since it is larger than the sum of its proper divisors (850892).

724015493881 is an frugal number, since it uses more digits than its factorization.

724015493881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701782 (or 850891 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 724015493881 in words is "seven hundred twenty-four billion, fifteen million, four hundred ninety-three thousand, eight hundred eighty-one".