26328578965 has 16 divisors (see below), whose sum is σ = 34028427888. Its totient is φ = 19440470016.

The previous prime is 26328578923. The next prime is 26328578993. The reversal of 26328578965 is 56987582362.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 13110708004 + 13217870961 = 114502^2 + 114969^2 .

It is a cyclic number.

It is not a de Polignac number, because 26328578965 - 2¹³ = 26328570773 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 781509 + ... + 814501.

It is an arithmetic number, because the mean of its divisors is an integer number (2126776743).

Almost surely, 2^26328578965 is an apocalyptic number.

It is an amenable number.

26328578965 is a deficient number, since it is larger than the sum of its proper divisors (7699848923).

26328578965 is a wasteful number, since it uses less digits than its factorization.

26328578965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45288.

The product of its digits is 43545600, while the sum is 61.

The spelling of 26328578965 in words is "twenty-six billion, three hundred twenty-eight million, five hundred seventy-eight thousand, nine hundred sixty-five".