2578238809129 has 2 divisors, whose sum is σ = 2578238809130. Its totient is φ = 2578238809128.

The previous prime is 2578238809067. The next prime is 2578238809183. The reversal of 2578238809129 is 9219088328752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1465002799129 + 1113236010000 = 1210373^2 + 1055100^2 .

It is a cyclic number.

It is not a de Polignac number, because 2578238809129 - 2¹³ = 2578238800937 is a prime.

It is not a weakly prime, because it can be changed into another prime (2578238800129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289119404564 + 1289119404565.

It is an arithmetic number, because the mean of its divisors is an integer number (1289119404565).

Almost surely, 2^{2578238809129} is an apocalyptic number.

It is an amenable number.

2578238809129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2578238809129 is an equidigital number, since it uses as much as digits as its factorization.

2578238809129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34836480, while the sum is 64.

The spelling of 2578238809129 in words is "two trillion, five hundred seventy-eight billion, two hundred thirty-eight million, eight hundred nine thousand, one hundred twenty-nine".