26856071477 has 2 divisors, whose sum is σ = 26856071478. Its totient is φ = 26856071476.

The previous prime is 26856071413. The next prime is 26856071507. The reversal of 26856071477 is 77417065862.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21318628081 + 5537443396 = 146009^2 + 74414^2 .

It is a cyclic number.

It is not a de Polignac number, because 26856071477 - 2⁶ = 26856071413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26856071677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13428035738 + 13428035739.

It is an arithmetic number, because the mean of its divisors is an integer number (13428035739).

Almost surely, 2^26856071477 is an apocalyptic number.

It is an amenable number.

26856071477 is a deficient number, since it is larger than the sum of its proper divisors (1).

26856071477 is an equidigital number, since it uses as much as digits as its factorization.

26856071477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3951360, while the sum is 53.

The spelling of 26856071477 in words is "twenty-six billion, eight hundred fifty-six million, seventy-one thousand, four hundred seventy-seven".