26785748288657 has 2 divisors, whose sum is σ = 26785748288658. Its totient is φ = 26785748288656.

The previous prime is 26785748288653. The next prime is 26785748288671. The reversal of 26785748288657 is 75688284758762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26428277032336 + 357471256321 = 5140844^2 + 597889^2 .

It is a cyclic number.

It is not a de Polignac number, because 26785748288657 - 2² = 26785748288653 is a prime.

It is a super-2 number, since 2×26785748288657² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26785748288653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13392874144328 + 13392874144329.

It is an arithmetic number, because the mean of its divisors is an integer number (13392874144329).

Almost surely, 2^{26785748288657} is an apocalyptic number.

It is an amenable number.

26785748288657 is a deficient number, since it is larger than the sum of its proper divisors (1).

26785748288657 is an equidigital number, since it uses as much as digits as its factorization.

26785748288657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20230963200, while the sum is 83.

The spelling of 26785748288657 in words is "twenty-six trillion, seven hundred eighty-five billion, seven hundred forty-eight million, two hundred eighty-eight thousand, six hundred fifty-seven".