26526371820 has 144 divisors (see below), whose sum is σ = 80794248192. Its totient is φ = 6499733760.

The previous prime is 26526371797. The next prime is 26526371831. The reversal of 26526371820 is 2817362562.

It is a super-2 number, since 2×26526371820² (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 47 ways as a sum of consecutive naturals, for example, 2255355 + ... + 2267085.

It is an arithmetic number, because the mean of its divisors is an integer number (561071168).

Almost surely, 2^26526371820 is an apocalyptic number.

26526371820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26526371820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40397124096).

26526371820 is an abundant number, since it is smaller than the sum of its proper divisors (54267876372).

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

26526371820 is a wasteful number, since it uses less digits than its factorization.

26526371820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11992 (or 11977 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 26526371820 in words is "twenty-six billion, five hundred twenty-six million, three hundred seventy-one thousand, eight hundred twenty".