26813409187 has 2 divisors, whose sum is σ = 26813409188. Its totient is φ = 26813409186.

The previous prime is 26813409151. The next prime is 26813409347. The reversal of 26813409187 is 78190431862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26813409187 - 2⁷ = 26813409059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26813409187.

It is not a weakly prime, because it can be changed into another prime (26813469187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13406704593 + 13406704594.

It is an arithmetic number, because the mean of its divisors is an integer number (13406704594).

Almost surely, 2^26813409187 is an apocalyptic number.

26813409187 is a deficient number, since it is larger than the sum of its proper divisors (1).

26813409187 is an equidigital number, since it uses as much as digits as its factorization.

26813409187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 26813409187 in words is "twenty-six billion, eight hundred thirteen million, four hundred nine thousand, one hundred eighty-seven".