26955555391 has 2 divisors, whose sum is σ = 26955555392. Its totient is φ = 26955555390.

The previous prime is 26955555349. The next prime is 26955555409. The reversal of 26955555391 is 19355555962.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26955555391 - 2¹¹ = 26955553343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26955555091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13477777695 + 13477777696.

It is an arithmetic number, because the mean of its divisors is an integer number (13477777696).

Almost surely, 2^26955555391 is an apocalyptic number.

26955555391 is a deficient number, since it is larger than the sum of its proper divisors (1).

26955555391 is an equidigital number, since it uses as much as digits as its factorization.

26955555391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9112500, while the sum is 55.

The spelling of 26955555391 in words is "twenty-six billion, nine hundred fifty-five million, five hundred fifty-five thousand, three hundred ninety-one".