4156864993 has 2 divisors, whose sum is σ = 4156864994. Its totient is φ = 4156864992.

The previous prime is 4156864967. The next prime is 4156865057. The reversal of 4156864993 is 3994686514.

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., 2555504704 + 1601360289 = 50552^2 + 40017^2 .

It is a cyclic number.

It is not a de Polignac number, because 4156864993 - 2¹³ = 4156856801 is a prime.

It is not a weakly prime, because it can be changed into another prime (4156864913) 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 as a sum of consecutive naturals, namely, 2078432496 + 2078432497.

It is an arithmetic number, because the mean of its divisors is an integer number (2078432497).

Almost surely, 2^4156864993 is an apocalyptic number.

It is an amenable number.

4156864993 is a deficient number, since it is larger than the sum of its proper divisors (1).

4156864993 is an equidigital number, since it uses as much as digits as its factorization.

4156864993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 55.

The square root of 4156864993 is about 64473.7542958373. The cubic root of 4156864993 is about 1607.8861953865.

The spelling of 4156864993 in words is "four billion, one hundred fifty-six million, eight hundred sixty-four thousand, nine hundred ninety-three".