723630321572 has 6 divisors (see below), whose sum is σ = 1266353062758. Its totient is φ = 361815160784.

The previous prime is 723630321541. The next prime is 723630321629. The reversal of 723630321572 is 275123036327.

It can be written as a sum of positive squares in only one way, i.e., 644012670016 + 79617651556 = 802504^2 + 282166^2 .

It is a super-2 number, since 2×723630321572² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90453790193 + ... + 90453790200.

It is an arithmetic number, because the mean of its divisors is an integer number (211058843793).

Almost surely, 2^723630321572 is an apocalyptic number.

It is an amenable number.

723630321572 is a deficient number, since it is larger than the sum of its proper divisors (542722741186).

723630321572 is a wasteful number, since it uses less digits than its factorization.

723630321572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180907580397 (or 180907580395 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 41.

Adding to 723630321572 its reverse (275123036327), we get a palindrome (998753357899).

The spelling of 723630321572 in words is "seven hundred twenty-three billion, six hundred thirty million, three hundred twenty-one thousand, five hundred seventy-two".