4891389656 has 16 divisors (see below), whose sum is σ = 9175731840. Its totient is φ = 2444527840.

The previous prime is 4891389649. The next prime is 4891389673. The reversal of 4891389656 is 6569831984.

It is a junction number, because it is equal to n+sod(n) for n = 4891389595 and 4891389604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127931 + ... + 161706.

It is an arithmetic number, because the mean of its divisors is an integer number (573483240).

Almost surely, 2^4891389656 is an apocalyptic number.

It is an amenable number.

4891389656 is a deficient number, since it is larger than the sum of its proper divisors (4284342184).

4891389656 is a wasteful number, since it uses less digits than its factorization.

4891389656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291754 (or 291750 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 59.

The square root of 4891389656 is about 69938.4705008624. The cubic root of 4891389656 is about 1697.5037939130.

The spelling of 4891389656 in words is "four billion, eight hundred ninety-one million, three hundred eighty-nine thousand, six hundred fifty-six".