26383785557 has 2 divisors, whose sum is σ = 26383785558. Its totient is φ = 26383785556.

The previous prime is 26383785541. The next prime is 26383785641. The reversal of 26383785557 is 75558738362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21754480036 + 4629305521 = 147494^2 + 68039^2 .

It is a cyclic number.

It is not a de Polignac number, because 26383785557 - 2⁴ = 26383785541 is a prime.

It is a super-2 number, since 2×26383785557² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26383785496 and 26383785505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26383775557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13191892778 + 13191892779.

It is an arithmetic number, because the mean of its divisors is an integer number (13191892779).

Almost surely, 2^26383785557 is an apocalyptic number.

It is an amenable number.

26383785557 is a deficient number, since it is larger than the sum of its proper divisors (1).

26383785557 is an equidigital number, since it uses as much as digits as its factorization.

26383785557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336000, while the sum is 59.

The spelling of 26383785557 in words is "twenty-six billion, three hundred eighty-three million, seven hundred eighty-five thousand, five hundred fifty-seven".