2578738163 has 2 divisors, whose sum is σ = 2578738164. Its totient is φ = 2578738162.

The previous prime is 2578738133. The next prime is 2578738171. The reversal of 2578738163 is 3618378752.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2578738163 is a prime.

It is a super-2 number, since 2×2578738163² = 13299781026625229138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2578738133) 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, 1289369081 + 1289369082.

It is an arithmetic number, because the mean of its divisors is an integer number (1289369082).

Almost surely, 2^2578738163 is an apocalyptic number.

2578738163 is a deficient number, since it is larger than the sum of its proper divisors (1).

2578738163 is an equidigital number, since it uses as much as digits as its factorization.

2578738163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 50.

The square root of 2578738163 is about 50781.2776818386. The cubic root of 2578738163 is about 1371.3103351218.

The spelling of 2578738163 in words is "two billion, five hundred seventy-eight million, seven hundred thirty-eight thousand, one hundred sixty-three".