26436782993 has 2 divisors, whose sum is σ = 26436782994. Its totient is φ = 26436782992.

The previous prime is 26436782971. The next prime is 26436783007. The reversal of 26436782993 is 39928763462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24120574864 + 2316208129 = 155308^2 + 48127^2 .

It is a cyclic number.

It is not a de Polignac number, because 26436782993 - 2⁸ = 26436782737 is a prime.

It is not a weakly prime, because it can be changed into another prime (26436782923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13218391496 + 13218391497.

It is an arithmetic number, because the mean of its divisors is an integer number (13218391497).

Almost surely, 2^26436782993 is an apocalyptic number.

It is an amenable number.

26436782993 is a deficient number, since it is larger than the sum of its proper divisors (1).

26436782993 is an equidigital number, since it uses as much as digits as its factorization.

26436782993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23514624, while the sum is 59.

The spelling of 26436782993 in words is "twenty-six billion, four hundred thirty-six million, seven hundred eighty-two thousand, nine hundred ninety-three".