723680281636 has 27 divisors (see below), whose sum is σ = 1371394637361. Its totient is φ = 333996075504.

The previous prime is 723680281609. The next prime is 723680281637. The reversal of 723680281636 is 636182086327.

The square root of 723680281636 is 850694.

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

It can be written as a sum of positive squares in only one way, i.e., 107053296100 + 616626985536 = 327190^2 + 785256^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (723680281637) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22101685 + ... + 22134403.

Almost surely, 2^723680281636 is an apocalyptic number.

723680281636 is the 850694-th square number.

It is an amenable number.

723680281636 is a deficient number, since it is larger than the sum of its proper divisors (647714355725).

723680281636 is an frugal number, since it uses more digits than its factorization.

723680281636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65468 (or 32734 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 723680281636 in words is "seven hundred twenty-three billion, six hundred eighty million, two hundred eighty-one thousand, six hundred thirty-six".