26215150993 has 2 divisors, whose sum is σ = 26215150994. Its totient is φ = 26215150992.

The previous prime is 26215150957. The next prime is 26215150999. The reversal of 26215150993 is 39905151262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25867253889 + 347897104 = 160833^2 + 18652^2 .

It is a cyclic number.

It is not a de Polignac number, because 26215150993 - 2¹⁷ = 26215019921 is a prime.

It is not a weakly prime, because it can be changed into another prime (26215150999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13107575496 + 13107575497.

It is an arithmetic number, because the mean of its divisors is an integer number (13107575497).

Almost surely, 2^26215150993 is an apocalyptic number.

It is an amenable number.

26215150993 is a deficient number, since it is larger than the sum of its proper divisors (1).

26215150993 is an equidigital number, since it uses as much as digits as its factorization.

26215150993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 43.

The spelling of 26215150993 in words is "twenty-six billion, two hundred fifteen million, one hundred fifty thousand, nine hundred ninety-three".