26781116961 has 8 divisors (see below), whose sum is σ = 35864087680. Its totient is φ = 17776112112.

The previous prime is 26781116941. The next prime is 26781116963. The reversal of 26781116961 is 16961118762.

It is a happy number.

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

It is not a de Polignac number, because 26781116961 - 2²² = 26776922657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26781116961.

It is not an unprimeable number, because it can be changed into a prime (26781116963) 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, 19490665 + ... + 19492038.

It is an arithmetic number, because the mean of its divisors is an integer number (4483010960).

Almost surely, 2^26781116961 is an apocalyptic number.

It is an amenable number.

26781116961 is a deficient number, since it is larger than the sum of its proper divisors (9082970719).

26781116961 is a wasteful number, since it uses less digits than its factorization.

26781116961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38982935.

The product of its digits is 217728, while the sum is 48.

The spelling of 26781116961 in words is "twenty-six billion, seven hundred eighty-one million, one hundred sixteen thousand, nine hundred sixty-one".