26854111621 has 8 divisors (see below), whose sum is σ = 27834708600. Its totient is φ = 25877154240.

The previous prime is 26854111607. The next prime is 26854111657. The reversal of 26854111621 is 12611145862.

It can be written as a sum of positive squares in 4 ways, for example, as 6191486596 + 20662625025 = 78686^2 + 143745^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 26854111621 - 2³¹ = 24706627973 is a prime.

It is a super-2 number, since 2×26854111621² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26854111601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 894870 + ... + 924391.

It is an arithmetic number, because the mean of its divisors is an integer number (3479338575).

Almost surely, 2^26854111621 is an apocalyptic number.

It is an amenable number.

26854111621 is a deficient number, since it is larger than the sum of its proper divisors (980596979).

26854111621 is a wasteful number, since it uses less digits than its factorization.

26854111621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819799.

The product of its digits is 23040, while the sum is 37.

The spelling of 26854111621 in words is "twenty-six billion, eight hundred fifty-four million, one hundred eleven thousand, six hundred twenty-one".