26168557519 has 24 divisors (see below), whose sum is σ = 29845906272. Its totient is φ = 22804943040.

The previous prime is 26168557489. The next prime is 26168557603. The reversal of 26168557519 is 91575586162.

It is a de Polignac number, because none of the positive numbers 2^k-26168557519 is a prime.

It is a super-2 number, since 2×26168557519² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26168557519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26168557619) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1365534 + ... + 1384564.

It is an arithmetic number, because the mean of its divisors is an integer number (1243579428).

Almost surely, 2^26168557519 is an apocalyptic number.

26168557519 is a deficient number, since it is larger than the sum of its proper divisors (3677348753).

26168557519 is a wasteful number, since it uses less digits than its factorization.

26168557519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19375 (or 19356 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 55.

The spelling of 26168557519 in words is "twenty-six billion, one hundred sixty-eight million, five hundred fifty-seven thousand, five hundred nineteen".