26428442017538 has 54 divisors (see below), whose sum is σ = 45990892279017. Its totient is φ = 11380014486720.

The previous prime is 26428442017531. The next prime is 26428442017583. The reversal of 26428442017538 is 83571024482462.

It can be written as a sum of positive squares in 2 ways, for example, as 24149528723089 + 2278913294449 = 4914217^2 + 1509607^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3635137.

It is not an unprimeable number, because it can be changed into a prime (26428442017531) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1519478570 + ... + 1519495962.

Almost surely, 2^{26428442017538} is an apocalyptic number.

26428442017538 is a deficient number, since it is larger than the sum of its proper divisors (19562450261479).

26428442017538 is an frugal number, since it uses more digits than its factorization.

26428442017538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34848 (or 17425 counting only the distinct ones).

The product of its (nonzero) digits is 20643840, while the sum is 56.

The spelling of 26428442017538 in words is "twenty-six trillion, four hundred twenty-eight billion, four hundred forty-two million, seventeen thousand, five hundred thirty-eight".