26690437243 has 2 divisors, whose sum is σ = 26690437244. Its totient is φ = 26690437242.

The previous prime is 26690437231. The next prime is 26690437349. The reversal of 26690437243 is 34273409662.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26690437243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26690437193 and 26690437202.

It is not a weakly prime, because it can be changed into another prime (26690437043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13345218621 + 13345218622.

It is an arithmetic number, because the mean of its divisors is an integer number (13345218622).

Almost surely, 2^26690437243 is an apocalyptic number.

26690437243 is a deficient number, since it is larger than the sum of its proper divisors (1).

26690437243 is an equidigital number, since it uses as much as digits as its factorization.

26690437243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 46.

The spelling of 26690437243 in words is "twenty-six billion, six hundred ninety million, four hundred thirty-seven thousand, two hundred forty-three".