26187667374961 has 4 divisors (see below), whose sum is σ = 26187701835492. Its totient is φ = 26187632914432.

The previous prime is 26187667374949. The next prime is 26187667374983. The reversal of 26187667374961 is 16947376678162.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9350752410000 + 16836914964961 = 3057900^2 + 4103281^2 .

It is a cyclic number.

It is not a de Polignac number, because 26187667374961 - 2¹¹ = 26187667372913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26187667324961) 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, 16064056 + ... + 17619001.

It is an arithmetic number, because the mean of its divisors is an integer number (6546925458873).

Almost surely, 2^{26187667374961} is an apocalyptic number.

It is an amenable number.

26187667374961 is a deficient number, since it is larger than the sum of its proper divisors (34460531).

26187667374961 is an equidigital number, since it uses as much as digits as its factorization.

26187667374961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34460530.

The product of its digits is 768144384, while the sum is 73.

The spelling of 26187667374961 in words is "twenty-six trillion, one hundred eighty-seven billion, six hundred sixty-seven million, three hundred seventy-four thousand, nine hundred sixty-one".