26425787197 has 2 divisors, whose sum is σ = 26425787198. Its totient is φ = 26425787196.

The previous prime is 26425787183. The next prime is 26425787221. The reversal of 26425787197 is 79178752462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15839229316 + 10586557881 = 125854^2 + 102891^2 .

It is a cyclic number.

It is not a de Polignac number, because 26425787197 - 2²³ = 26417398589 is a prime.

It is a super-2 number, since 2×26425787197² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26425187197) 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, 13212893598 + 13212893599.

It is an arithmetic number, because the mean of its divisors is an integer number (13212893599).

Almost surely, 2^26425787197 is an apocalyptic number.

It is an amenable number.

26425787197 is a deficient number, since it is larger than the sum of its proper divisors (1).

26425787197 is an equidigital number, since it uses as much as digits as its factorization.

26425787197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11854080, while the sum is 58.

The spelling of 26425787197 in words is "twenty-six billion, four hundred twenty-five million, seven hundred eighty-seven thousand, one hundred ninety-seven".