26782357531 has 2 divisors, whose sum is σ = 26782357532. Its totient is φ = 26782357530.

The previous prime is 26782357411. The next prime is 26782357543. The reversal of 26782357531 is 13575328762.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26782357531 - 2³¹ = 24634873883 is a prime.

It is a super-2 number, since 2×26782357531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26782057531) 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, 13391178765 + 13391178766.

It is an arithmetic number, because the mean of its divisors is an integer number (13391178766).

Almost surely, 2^26782357531 is an apocalyptic number.

26782357531 is a deficient number, since it is larger than the sum of its proper divisors (1).

26782357531 is an equidigital number, since it uses as much as digits as its factorization.

26782357531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2116800, while the sum is 49.

The spelling of 26782357531 in words is "twenty-six billion, seven hundred eighty-two million, three hundred fifty-seven thousand, five hundred thirty-one".