26309140258 has 4 divisors (see below), whose sum is σ = 39463710390. Its totient is φ = 13154570128.

The previous prime is 26309140243. The next prime is 26309140261. The reversal of 26309140258 is 85204190362.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24038331849 + 2270808409 = 155043^2 + 47653^2 .

It is a super-2 number, since 2×26309140258² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 26309140258.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6577285063 + ... + 6577285066.

Almost surely, 2^26309140258 is an apocalyptic number.

26309140258 is a deficient number, since it is larger than the sum of its proper divisors (13154570132).

26309140258 is a wasteful number, since it uses less digits than its factorization.

26309140258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13154570131.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 26309140258 in words is "twenty-six billion, three hundred nine million, one hundred forty thousand, two hundred fifty-eight".