26156344644 has 18 divisors (see below), whose sum is σ = 66117426830. Its totient is φ = 8718781536.

The previous prime is 26156344607. The next prime is 26156344663. The reversal of 26156344644 is 44644365162.

26156344644 is a `hidden beast` number, since 2 + 6 + 1 + 5 + 634 + 4 + 6 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24052287744 + 2104056900 = 155088^2 + 45870^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 26156344644.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 363282529 + ... + 363282600.

Almost surely, 2^26156344644 is an apocalyptic number.

It is an amenable number.

26156344644 is an abundant number, since it is smaller than the sum of its proper divisors (39961082186).

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

26156344644 is a wasteful number, since it uses less digits than its factorization.

26156344644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726565139 (or 726565134 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 45.

The spelling of 26156344644 in words is "twenty-six billion, one hundred fifty-six million, three hundred forty-four thousand, six hundred forty-four".