26646818028 has 24 divisors (see below), whose sum is σ = 65833315632. Its totient is φ = 8359785984.

The previous prime is 26646818021. The next prime is 26646818039. The reversal of 26646818028 is 82081864662.

It is a super-2 number, since 2×26646818028² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (26646818021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65310625 + ... + 65311032.

It is an arithmetic number, because the mean of its divisors is an integer number (2743054818).

Almost surely, 2^26646818028 is an apocalyptic number.

It is an amenable number.

26646818028 is an abundant number, since it is smaller than the sum of its proper divisors (39186497604).

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

26646818028 is a wasteful number, since it uses less digits than its factorization.

26646818028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130621681 (or 130621679 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 51.

The spelling of 26646818028 in words is "twenty-six billion, six hundred forty-six million, eight hundred eighteen thousand, twenty-eight".