26988801215 has 4 divisors (see below), whose sum is σ = 32386561464. Its totient is φ = 21591040968.

The previous prime is 26988801187. The next prime is 26988801223. The reversal of 26988801215 is 51210888962.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51210888962 = 2 ⋅25605444481.

It is a cyclic number.

It is not a de Polignac number, because 26988801215 - 2¹² = 26988797119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2698880117 + ... + 2698880126.

It is an arithmetic number, because the mean of its divisors is an integer number (8096640366).

Almost surely, 2^26988801215 is an apocalyptic number.

26988801215 is a deficient number, since it is larger than the sum of its proper divisors (5397760249).

26988801215 is an equidigital number, since it uses as much as digits as its factorization.

26988801215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5397760248.

The product of its (nonzero) digits is 552960, while the sum is 50.

The spelling of 26988801215 in words is "twenty-six billion, nine hundred eighty-eight million, eight hundred one thousand, two hundred fifteen".