720583113681 has 12 divisors (see below), whose sum is σ = 1040854852752. Its totient is φ = 480382937496.

The previous prime is 720583113629. The next prime is 720583113689. The reversal of 720583113681 is 186311385027.

It is a happy number.

720583113681 is a `hidden beast` number, since 7 + 2 + 0 + 583 + 1 + 1 + 3 + 68 + 1 = 666.

It is not a de Polignac number, because 720583113681 - 2⁷ = 720583113553 is a prime.

It is a super-2 number, since 2×720583113681² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (720583113689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384430 + ... + 1260536.

It is an arithmetic number, because the mean of its divisors is an integer number (86737904396).

Almost surely, 2^720583113681 is an apocalyptic number.

It is an amenable number.

720583113681 is a deficient number, since it is larger than the sum of its proper divisors (320271739071).

720583113681 is a wasteful number, since it uses less digits than its factorization.

720583113681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967500 (or 967497 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 720583113681 in words is "seven hundred twenty billion, five hundred eighty-three million, one hundred thirteen thousand, six hundred eighty-one".