720716617026 has 128 divisors (see below), whose sum is σ = 1848630159360. Its totient is φ = 203869555776.

The previous prime is 720716617021. The next prime is 720716617043. The reversal of 720716617026 is 620716617027.

720716617026 is a `hidden beast` number, since 7 + 2 + 0 + 7 + 1 + 6 + 617 + 0 + 26 = 666.

720716617026 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 Curzon number.

It is not an unprimeable number, because it can be changed into a prime (720716617021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 80766201 + ... + 80775123.

It is an arithmetic number, because the mean of its divisors is an integer number (14442423120).

Almost surely, 2^720716617026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720716617026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (924315079680).

720716617026 is an abundant number, since it is smaller than the sum of its proper divisors (1127913542334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

720716617026 is a wasteful number, since it uses less digits than its factorization.

720716617026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11045 (or 11039 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

Subtracting from 720716617026 its reverse (620716617027), we obtain a palindrome (99999999999).

The spelling of 720716617026 in words is "seven hundred twenty billion, seven hundred sixteen million, six hundred seventeen thousand, twenty-six".