26506172051 has 2 divisors, whose sum is σ = 26506172052. Its totient is φ = 26506172050.

The previous prime is 26506172023. The next prime is 26506172083. The reversal of 26506172051 is 15027160562.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26506172051 is a prime.

It is not a weakly prime, because it can be changed into another prime (26506172551) 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, 13253086025 + 13253086026.

It is an arithmetic number, because the mean of its divisors is an integer number (13253086026).

Almost surely, 2^26506172051 is an apocalyptic number.

26506172051 is a deficient number, since it is larger than the sum of its proper divisors (1).

26506172051 is an equidigital number, since it uses as much as digits as its factorization.

26506172051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 26506172051 in words is "twenty-six billion, five hundred six million, one hundred seventy-two thousand, fifty-one".