720461813672 has 8 divisors (see below), whose sum is σ = 1350865900650. Its totient is φ = 360230906832.

The previous prime is 720461813671. The next prime is 720461813723. The reversal of 720461813672 is 276318164027.

It can be written as a sum of positive squares in only one way, i.e., 614364386596 + 106097427076 = 783814^2 + 325726^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×720461813672² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (720461813671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45028863347 + ... + 45028863362.

Almost surely, 2^720461813672 is an apocalyptic number.

It is an amenable number.

720461813672 is a deficient number, since it is larger than the sum of its proper divisors (630404086978).

720461813672 is a wasteful number, since it uses less digits than its factorization.

720461813672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90057726715 (or 90057726711 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 47.

Adding to 720461813672 its reverse (276318164027), we get a palindrome (996779977699).

The spelling of 720461813672 in words is "seven hundred twenty billion, four hundred sixty-one million, eight hundred thirteen thousand, six hundred seventy-two".