26006215513 has 4 divisors (see below), whose sum is σ = 26007978240. Its totient is φ = 26004452788.

The previous prime is 26006215507. The next prime is 26006215519. The reversal of 26006215513 is 31551260062.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (26006215507) and next prime (26006215519).

It is a cyclic number.

It is not a de Polignac number, because 26006215513 - 2²⁹ = 25469344601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26006215519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 859045 + ... + 888802.

It is an arithmetic number, because the mean of its divisors is an integer number (6501994560).

Almost surely, 2^26006215513 is an apocalyptic number.

It is an amenable number.

26006215513 is a deficient number, since it is larger than the sum of its proper divisors (1762727).

26006215513 is a wasteful number, since it uses less digits than its factorization.

26006215513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762726.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 26006215513 its reverse (31551260062), we get a palindrome (57557475575).

The spelling of 26006215513 in words is "twenty-six billion, six million, two hundred fifteen thousand, five hundred thirteen".