26520802639 has 2 divisors, whose sum is σ = 26520802640. Its totient is φ = 26520802638.

The previous prime is 26520802603. The next prime is 26520802643. The reversal of 26520802639 is 93620802562.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26520802639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26520802595 and 26520802604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26520862639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13260401319 + 13260401320.

It is an arithmetic number, because the mean of its divisors is an integer number (13260401320).

Almost surely, 2^26520802639 is an apocalyptic number.

26520802639 is a deficient number, since it is larger than the sum of its proper divisors (1).

26520802639 is an equidigital number, since it uses as much as digits as its factorization.

26520802639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 26520802639 in words is "twenty-six billion, five hundred twenty million, eight hundred two thousand, six hundred thirty-nine".