26165650564 has 27 divisors (see below), whose sum is σ = 47332771941. Its totient is φ = 12655945920.

The previous prime is 26165650561. The next prime is 26165650571. The reversal of 26165650564 is 46505656162.

The square root of 26165650564 is 161758.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 12579416964 + 13586233600 = 112158^2 + 116560^2 .

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (26165650561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10027692 + ... + 10030300.

Almost surely, 2^26165650564 is an apocalyptic number.

26165650564 is the 161758-th square number.

It is an amenable number.

26165650564 is a deficient number, since it is larger than the sum of its proper divisors (21167121377).

26165650564 is an frugal number, since it uses more digits than its factorization.

26165650564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5284 (or 2642 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 26165650564 in words is "twenty-six billion, one hundred sixty-five million, six hundred fifty thousand, five hundred sixty-four".