26198172819 has 256 divisors, whose sum is σ = 53238169600. Its totient is φ = 12345177600.

The previous prime is 26198172797. The next prime is 26198172821. The reversal of 26198172819 is 91827189162.

It is a happy number.

26198172819 is a `hidden beast` number, since 2 + 619 + 8 + 1 + 7 + 2 + 8 + 19 = 666.

It is not a de Polignac number, because 26198172819 - 2¹² = 26198168723 is a prime.

It is a super-2 number, since 2×26198172819² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26198171819) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 62228229 + ... + 62228649.

It is an arithmetic number, because the mean of its divisors is an integer number (207961600).

Almost surely, 2^26198172819 is an apocalyptic number.

26198172819 is an abundant number, since it is smaller than the sum of its proper divisors (27039996781).

26198172819 is a wasteful number, since it uses less digits than its factorization.

26198172819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 537 counting only the distinct ones).

The product of its digits is 870912, while the sum is 54.

The spelling of 26198172819 in words is "twenty-six billion, one hundred ninety-eight million, one hundred seventy-two thousand, eight hundred nineteen".