26617634816 has 56 divisors (see below), whose sum is σ = 53301762840. Its totient is φ = 13291388928.

The previous prime is 26617634807. The next prime is 26617634851. The reversal of 26617634816 is 61843671662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8165795 + ... + 8169053.

Almost surely, 2^26617634816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26617634816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26650881420).

26617634816 is an abundant number, since it is smaller than the sum of its proper divisors (26684128024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26617634816 is an frugal number, since it uses more digits than its factorization.

26617634816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282 (or 4258 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The spelling of 26617634816 in words is "twenty-six billion, six hundred seventeen million, six hundred thirty-four thousand, eight hundred sixteen".