789938655681 has 32 divisors (see below), whose sum is σ = 1252421487360. Its totient is φ = 433308927744.

The previous prime is 789938655637. The next prime is 789938655703. The reversal of 789938655681 is 186556839987.

It is not a de Polignac number, because 789938655681 - 2⁷ = 789938655553 is a prime.

It is a super-2 number, since 2×789938655681² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (789938655601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3643510 + ... + 3854223.

It is an arithmetic number, because the mean of its divisors is an integer number (39138171480).

Almost surely, 2^789938655681 is an apocalyptic number.

It is an amenable number.

789938655681 is a deficient number, since it is larger than the sum of its proper divisors (462482831679).

789938655681 is a wasteful number, since it uses less digits than its factorization.

789938655681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7497945.

The product of its digits is 783820800, while the sum is 75.

The spelling of 789938655681 in words is "seven hundred eighty-nine billion, nine hundred thirty-eight million, six hundred fifty-five thousand, six hundred eighty-one".