26440644401173 has 16 divisors (see below), whose sum is σ = 27068825300400. Its totient is φ = 25817480765440.

The previous prime is 26440644401137. The next prime is 26440644401189. The reversal of 26440644401173 is 37110444604462.

It can be written as a sum of positive squares in 8 ways, for example, as 347938358769 + 26092706042404 = 589863^2 + 5108102^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26440644401173 is a prime.

It is a super-2 number, since 2×26440644401173² (a number of 28 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 (26440644801173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10951173 + ... + 13145701.

It is an arithmetic number, because the mean of its divisors is an integer number (1691801581275).

Almost surely, 2^{26440644401173} is an apocalyptic number.

It is an amenable number.

26440644401173 is a deficient number, since it is larger than the sum of its proper divisors (628180899227).

26440644401173 is a wasteful number, since it uses less digits than its factorization.

26440644401173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195672.

The product of its (nonzero) digits is 1548288, while the sum is 46.

The spelling of 26440644401173 in words is "twenty-six trillion, four hundred forty billion, six hundred forty-four million, four hundred one thousand, one hundred seventy-three".