4156864849 has 2 divisors, whose sum is σ = 4156864850. Its totient is φ = 4156864848.

The previous prime is 4156864841. The next prime is 4156864867. The reversal of 4156864849 is 9484686514.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2901438225 + 1255426624 = 53865^2 + 35432^2 .

It is a cyclic number.

It is not a de Polignac number, because 4156864849 - 2³ = 4156864841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4156864849.

It is not a weakly prime, because it can be changed into another prime (4156864841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2078432424 + 2078432425.

It is an arithmetic number, because the mean of its divisors is an integer number (2078432425).

Almost surely, 2^4156864849 is an apocalyptic number.

It is an amenable number.

4156864849 is a deficient number, since it is larger than the sum of its proper divisors (1).

4156864849 is an equidigital number, since it uses as much as digits as its factorization.

4156864849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6635520, while the sum is 55.

The square root of 4156864849 is about 64473.7531791038. The cubic root of 4156864849 is about 1607.8861768200.

The spelling of 4156864849 in words is "four billion, one hundred fifty-six million, eight hundred sixty-four thousand, eight hundred forty-nine".