26513150549 has 2 divisors, whose sum is σ = 26513150550. Its totient is φ = 26513150548.

The previous prime is 26513150537. The next prime is 26513150597. The reversal of 26513150549 is 94505131562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26497979524 + 15171025 = 162782^2 + 3895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26513150549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26513050549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13256575274 + 13256575275.

It is an arithmetic number, because the mean of its divisors is an integer number (13256575275).

Almost surely, 2^26513150549 is an apocalyptic number.

It is an amenable number.

26513150549 is a deficient number, since it is larger than the sum of its proper divisors (1).

26513150549 is an equidigital number, since it uses as much as digits as its factorization.

26513150549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 26513150549 in words is "twenty-six billion, five hundred thirteen million, one hundred fifty thousand, five hundred forty-nine".