26161621753 has 2 divisors, whose sum is σ = 26161621754. Its totient is φ = 26161621752.

The previous prime is 26161621747. The next prime is 26161621879. The reversal of 26161621753 is 35712616162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15309607824 + 10852013929 = 123732^2 + 104173^2 .

It is a cyclic number.

It is not a de Polignac number, because 26161621753 - 2¹⁷ = 26161490681 is a prime.

It is not a weakly prime, because it can be changed into another prime (26161627753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13080810876 + 13080810877.

It is an arithmetic number, because the mean of its divisors is an integer number (13080810877).

Almost surely, 2^26161621753 is an apocalyptic number.

It is an amenable number.

26161621753 is a deficient number, since it is larger than the sum of its proper divisors (1).

26161621753 is an equidigital number, since it uses as much as digits as its factorization.

26161621753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The spelling of 26161621753 in words is "twenty-six billion, one hundred sixty-one million, six hundred twenty-one thousand, seven hundred fifty-three".