26148491389 has 2 divisors, whose sum is σ = 26148491390. Its totient is φ = 26148491388.

The previous prime is 26148491387. The next prime is 26148491417. The reversal of 26148491389 is 98319484162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18890303364 + 7258188025 = 137442^2 + 85195^2 .

It is a cyclic number.

It is not a de Polignac number, because 26148491389 - 2¹ = 26148491387 is a prime.

Together with 26148491387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26148491387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13074245694 + 13074245695.

It is an arithmetic number, because the mean of its divisors is an integer number (13074245695).

Almost surely, 2^26148491389 is an apocalyptic number.

It is an amenable number.

26148491389 is a deficient number, since it is larger than the sum of its proper divisors (1).

26148491389 is an equidigital number, since it uses as much as digits as its factorization.

26148491389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2985984, while the sum is 55.

The spelling of 26148491389 in words is "twenty-six billion, one hundred forty-eight million, four hundred ninety-one thousand, three hundred eighty-nine".