26626705644 has 144 divisors (see below), whose sum is σ = 80521136640. Its totient is φ = 6768800640.

The previous prime is 26626705643. The next prime is 26626705663. The reversal of 26626705644 is 44650762662.

It is a junction number, because it is equal to n+sod(n) for n = 26626705593 and 26626705602.

It is not an unprimeable number, because it can be changed into a prime (26626705643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 260202 + ... + 347790.

It is an arithmetic number, because the mean of its divisors is an integer number (559174560).

Almost surely, 2^26626705644 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 26626705644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40260568320).

26626705644 is an abundant number, since it is smaller than the sum of its proper divisors (53894430996).

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

26626705644 is a wasteful number, since it uses less digits than its factorization.

26626705644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87668 (or 87659 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 48.

The spelling of 26626705644 in words is "twenty-six billion, six hundred twenty-six million, seven hundred five thousand, six hundred forty-four".