26121052515 has 8 divisors (see below), whose sum is σ = 41793684048. Its totient is φ = 13931228000.

The previous prime is 26121052493. The next prime is 26121052519. The reversal of 26121052515 is 51525012162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26121052515 - 2⁷ = 26121052387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26121052519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 870701736 + ... + 870701765.

It is an arithmetic number, because the mean of its divisors is an integer number (5224210506).

Almost surely, 2^26121052515 is an apocalyptic number.

26121052515 is a deficient number, since it is larger than the sum of its proper divisors (15672631533).

26121052515 is a wasteful number, since it uses less digits than its factorization.

26121052515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741403509.

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 26121052515 its reverse (51525012162), we get a palindrome (77646064677).

The spelling of 26121052515 in words is "twenty-six billion, one hundred twenty-one million, fifty-two thousand, five hundred fifteen".