26489802187 has 2 divisors, whose sum is σ = 26489802188. Its totient is φ = 26489802186.

The previous prime is 26489802181. The next prime is 26489802221. The reversal of 26489802187 is 78120898462.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26489802187 - 2¹⁵ = 26489769419 is a prime.

It is not a weakly prime, because it can be changed into another prime (26489802181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13244901093 + 13244901094.

It is an arithmetic number, because the mean of its divisors is an integer number (13244901094).

Almost surely, 2^26489802187 is an apocalyptic number.

26489802187 is a deficient number, since it is larger than the sum of its proper divisors (1).

26489802187 is an equidigital number, since it uses as much as digits as its factorization.

26489802187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3096576, while the sum is 55.

The spelling of 26489802187 in words is "twenty-six billion, four hundred eighty-nine million, eight hundred two thousand, one hundred eighty-seven".