720385021707 has 8 divisors (see below), whose sum is σ = 1034399005584. Its totient is φ = 443313859488.

The previous prime is 720385021673. The next prime is 720385021729. The reversal of 720385021707 is 707120583027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 720385021707 - 2²³ = 720376633099 is a prime.

It is a super-2 number, since 2×720385021707² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (720385021747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9235705368 + ... + 9235705445.

It is an arithmetic number, because the mean of its divisors is an integer number (129299875698).

Almost surely, 2^720385021707 is an apocalyptic number.

720385021707 is a deficient number, since it is larger than the sum of its proper divisors (314013983877).

720385021707 is a wasteful number, since it uses less digits than its factorization.

720385021707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18471410829.

The product of its (nonzero) digits is 164640, while the sum is 42.

The spelling of 720385021707 in words is "seven hundred twenty billion, three hundred eighty-five million, twenty-one thousand, seven hundred seven".