26155341577 has 4 divisors (see below), whose sum is σ = 26155671700. Its totient is φ = 26155011456.

The previous prime is 26155341571. The next prime is 26155341581. The reversal of 26155341577 is 77514355162.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 18315832896 + 7839508681 = 135336^2 + 88541^2 .

It is a 3-Lehmer number, since φ(26155341577) divides (26155341577-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26155341577 is a prime.

It is a deceptive number, since it divides R_26155341576.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26155341571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33013 + ... + 231085.

It is an arithmetic number, because the mean of its divisors is an integer number (6538917925).

Almost surely, 2^26155341577 is an apocalyptic number.

26155341577 is the 132049-th pentagonal number.

It is an amenable number.

26155341577 is a deficient number, since it is larger than the sum of its proper divisors (330123).

26155341577 is a wasteful number, since it uses less digits than its factorization.

26155341577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330122.

The product of its digits is 882000, while the sum is 46.

The spelling of 26155341577 in words is "twenty-six billion, one hundred fifty-five million, three hundred forty-one thousand, five hundred seventy-seven".