4681839521 has 2 divisors, whose sum is σ = 4681839522. Its totient is φ = 4681839520.

The previous prime is 4681839493. The next prime is 4681839553. The reversal of 4681839521 is 1259381864.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3787171600 + 894667921 = 61540^2 + 29911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4681839521 is a prime.

It is not a weakly prime, because it can be changed into another prime (4681838521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2340919760 + 2340919761.

It is an arithmetic number, because the mean of its divisors is an integer number (2340919761).

Almost surely, 2^4681839521 is an apocalyptic number.

It is an amenable number.

4681839521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4681839521 is an equidigital number, since it uses as much as digits as its factorization.

4681839521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 47.

The square root of 4681839521 is about 68423.9689071016. The cubic root of 4681839521 is about 1672.9084485450.

The spelling of 4681839521 in words is "four billion, six hundred eighty-one million, eight hundred thirty-nine thousand, five hundred twenty-one".