26020778243 has 2 divisors, whose sum is σ = 26020778244. Its totient is φ = 26020778242.

The previous prime is 26020778239. The next prime is 26020778261. The reversal of 26020778243 is 34287702062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26020778243 - 2² = 26020778239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26020778243.

It is not a weakly prime, because it can be changed into another prime (26020778263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13010389121 + 13010389122.

It is an arithmetic number, because the mean of its divisors is an integer number (13010389122).

Almost surely, 2^26020778243 is an apocalyptic number.

26020778243 is a deficient number, since it is larger than the sum of its proper divisors (1).

26020778243 is an equidigital number, since it uses as much as digits as its factorization.

26020778243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 41.

The spelling of 26020778243 in words is "twenty-six billion, twenty million, seven hundred seventy-eight thousand, two hundred forty-three".