53821680026 has 8 divisors (see below), whose sum is σ = 85481491860. Its totient is φ = 25327849408.

The previous prime is 53821680013. The next prime is 53821680047. The reversal of 53821680026 is 62008612835.

It is a Cunningham number, because it is equal to 231995²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 53821680025 + 1 = 231995^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×53821680026² (a number of 22 digits) contains 22 as substring.

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, 791495261 + ... + 791495328.

Almost surely, 2^53821680026 is an apocalyptic number.

53821680026 is a deficient number, since it is larger than the sum of its proper divisors (31659811834).

53821680026 is a wasteful number, since it uses less digits than its factorization.

53821680026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582990608.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 53821680026 in words is "fifty-three billion, eight hundred twenty-one million, six hundred eighty thousand, twenty-six".