4912078643 has 2 divisors, whose sum is σ = 4912078644. Its totient is φ = 4912078642.

The previous prime is 4912078631. The next prime is 4912078687. The reversal of 4912078643 is 3468702194.

4912078643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (4912078687) can be obtained adding 4912078643 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4912078643 - 2⁸ = 4912078387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4912078594 and 4912078603.

It is not a weakly prime, because it can be changed into another prime (4912078043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2456039321 + 2456039322.

It is an arithmetic number, because the mean of its divisors is an integer number (2456039322).

Almost surely, 2^4912078643 is an apocalyptic number.

4912078643 is a deficient number, since it is larger than the sum of its proper divisors (1).

4912078643 is an equidigital number, since it uses as much as digits as its factorization.

4912078643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 4912078643 is about 70086.2229186307. Note that the first 3 decimals coincide. The cubic root of 4912078643 is about 1699.8937238061.

The spelling of 4912078643 in words is "four billion, nine hundred twelve million, seventy-eight thousand, six hundred forty-three".