26509862387 has 2 divisors, whose sum is σ = 26509862388. Its totient is φ = 26509862386.

The previous prime is 26509862383. The next prime is 26509862413. The reversal of 26509862387 is 78326890562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26509862387 - 2² = 26509862383 is a prime.

It is not a weakly prime, because it can be changed into another prime (26509862383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13254931193 + 13254931194.

It is an arithmetic number, because the mean of its divisors is an integer number (13254931194).

Almost surely, 2^26509862387 is an apocalyptic number.

26509862387 is a deficient number, since it is larger than the sum of its proper divisors (1).

26509862387 is an equidigital number, since it uses as much as digits as its factorization.

26509862387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 26509862387 in words is "twenty-six billion, five hundred nine million, eight hundred sixty-two thousand, three hundred eighty-seven".