26765903081 has 2 divisors, whose sum is σ = 26765903082. Its totient is φ = 26765903080.

The previous prime is 26765903071. The next prime is 26765903201. The reversal of 26765903081 is 18030956762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16426267225 + 10339635856 = 128165^2 + 101684^2 .

It is a cyclic number.

It is not a de Polignac number, because 26765903081 - 2¹⁰ = 26765902057 is a prime.

It is a super-2 number, since 2×26765903081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26765903051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13382951540 + 13382951541.

It is an arithmetic number, because the mean of its divisors is an integer number (13382951541).

Almost surely, 2^26765903081 is an apocalyptic number.

It is an amenable number.

26765903081 is a deficient number, since it is larger than the sum of its proper divisors (1).

26765903081 is an equidigital number, since it uses as much as digits as its factorization.

26765903081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 26765903081 in words is "twenty-six billion, seven hundred sixty-five million, nine hundred three thousand, eighty-one".