26115553553551 has 16 divisors (see below), whose sum is σ = 32633149310208. Its totient is φ = 20303845660800.

The previous prime is 26115553553549. The next prime is 26115553553591. The reversal of 26115553553551 is 15535535551162.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 26115553553551 - 2¹ = 26115553553549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26115553553591) 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, 382768410 + ... + 382836631.

It is an arithmetic number, because the mean of its divisors is an integer number (2039571831888).

Almost surely, 2^{26115553553551} is an apocalyptic number.

26115553553551 is a deficient number, since it is larger than the sum of its proper divisors (6517595756657).

26115553553551 is a wasteful number, since it uses less digits than its factorization.

26115553553551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765605502.

The product of its digits is 8437500, while the sum is 52.

The spelling of 26115553553551 in words is "twenty-six trillion, one hundred fifteen billion, five hundred fifty-three million, five hundred fifty-three thousand, five hundred fifty-one".