26557820653 has 16 divisors (see below), whose sum is σ = 32690479360. Its totient is φ = 21010254336.

The previous prime is 26557820633. The next prime is 26557820687. The reversal of 26557820653 is 35602875562.

It is a cyclic number.

It is not a de Polignac number, because 26557820653 - 2¹⁷ = 26557689581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26557820597 and 26557820606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26557820603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1221088 + ... + 1242646.

It is an arithmetic number, because the mean of its divisors is an integer number (2043154960).

Almost surely, 2^26557820653 is an apocalyptic number.

It is an amenable number.

26557820653 is a deficient number, since it is larger than the sum of its proper divisors (6132658707).

26557820653 is a wasteful number, since it uses less digits than its factorization.

26557820653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35116.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 26557820653 in words is "twenty-six billion, five hundred fifty-seven million, eight hundred twenty thousand, six hundred fifty-three".