26862949642489 has 2 divisors, whose sum is σ = 26862949642490. Its totient is φ = 26862949642488.

The previous prime is 26862949642457. The next prime is 26862949642499. The reversal of 26862949642489 is 98424694926862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24448406588089 + 2414543054400 = 4944533^2 + 1553880^2 .

It is a cyclic number.

It is not a de Polignac number, because 26862949642489 - 2⁵ = 26862949642457 is a prime.

It is not a weakly prime, because it can be changed into another prime (26862949642499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13431474821244 + 13431474821245.

It is an arithmetic number, because the mean of its divisors is an integer number (13431474821245).

Almost surely, 2^{26862949642489} is an apocalyptic number.

It is an amenable number.

26862949642489 is a deficient number, since it is larger than the sum of its proper divisors (1).

26862949642489 is an equidigital number, since it uses as much as digits as its factorization.

26862949642489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5159780352, while the sum is 79.

The spelling of 26862949642489 in words is "twenty-six trillion, eight hundred sixty-two billion, nine hundred forty-nine million, six hundred forty-two thousand, four hundred eighty-nine".