26344552651621 has 16 divisors (see below), whose sum is σ = 27024969413376. Its totient is φ = 25669288460736.

The previous prime is 26344552651619. The next prime is 26344552651673. The reversal of 26344552651621 is 12615625544362.

It is a cyclic number.

It is not a de Polignac number, because 26344552651621 - 2¹ = 26344552651619 is a prime.

It is a super-4 number, since 4×26344552651621⁴ (a number of 55 digits) contains 4444 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 (26344552658621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14601175 + ... + 16305931.

It is an arithmetic number, because the mean of its divisors is an integer number (1689060588336).

Almost surely, 2^{26344552651621} is an apocalyptic number.

It is an amenable number.

26344552651621 is a deficient number, since it is larger than the sum of its proper divisors (680416761755).

26344552651621 is a wasteful number, since it uses less digits than its factorization.

26344552651621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706268.

The product of its digits is 10368000, while the sum is 52.

The spelling of 26344552651621 in words is "twenty-six trillion, three hundred forty-four billion, five hundred fifty-two million, six hundred fifty-one thousand, six hundred twenty-one".