26006635620 has 144 divisors (see below), whose sum is σ = 90442130688. Its totient is φ = 5925530880.

The previous prime is 26006635553. The next prime is 26006635651. The reversal of 26006635620 is 2653660062.

26006635620 is a `hidden beast` number, since 26 + 0 + 0 + 6 + 6 + 3 + 5 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 366865 + ... + 431975.

It is an arithmetic number, because the mean of its divisors is an integer number (628070352).

Almost surely, 2^26006635620 is an apocalyptic number.

26006635620 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 26006635620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45221065344).

26006635620 is an abundant number, since it is smaller than the sum of its proper divisors (64435495068).

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

26006635620 is a wasteful number, since it uses less digits than its factorization.

26006635620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65450 (or 65445 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 26006635620 in words is "twenty-six billion, six million, six hundred thirty-five thousand, six hundred twenty".