720107521521 has 8 divisors (see below), whose sum is σ = 982472277600. Its totient is φ = 468907223232.

The previous prime is 720107521501. The next prime is 720107521547. The reversal of 720107521521 is 125125701027.

720107521521 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 720107521521 - 2²⁵ = 720073967089 is a prime.

It is a super-2 number, since 2×720107521521² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (720107521501) 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, 2791114296 + ... + 2791114553.

It is an arithmetic number, because the mean of its divisors is an integer number (122809034700).

Almost surely, 2^720107521521 is an apocalyptic number.

It is an amenable number.

720107521521 is a deficient number, since it is larger than the sum of its proper divisors (262364756079).

720107521521 is a wasteful number, since it uses less digits than its factorization.

720107521521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5582228895.

The product of its (nonzero) digits is 9800, while the sum is 33.

The spelling of 720107521521 in words is "seven hundred twenty billion, one hundred seven million, five hundred twenty-one thousand, five hundred twenty-one".