26187667374949 has 2 divisors, whose sum is σ = 26187667374950. Its totient is φ = 26187667374948.

The previous prime is 26187667374907. The next prime is 26187667374983. The reversal of 26187667374949 is 94947376678162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14217499772100 + 11970167602849 = 3770610^2 + 3459793^2 .

It is a cyclic number.

It is not a de Polignac number, because 26187667374949 - 2⁷ = 26187667374821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26187667474949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13093833687474 + 13093833687475.

It is an arithmetic number, because the mean of its divisors is an integer number (13093833687475).

Almost surely, 2^{26187667374949} is an apocalyptic number.

It is an amenable number.

26187667374949 is a deficient number, since it is larger than the sum of its proper divisors (1).

26187667374949 is an equidigital number, since it uses as much as digits as its factorization.

26187667374949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608866304, while the sum is 79.

The spelling of 26187667374949 in words is "twenty-six trillion, one hundred eighty-seven billion, six hundred sixty-seven million, three hundred seventy-four thousand, nine hundred forty-nine".