26128136164 has 27 divisors (see below), whose sum is σ = 49520010267. Its totient is φ = 12057200064.

The previous prime is 26128136147. The next prime is 26128136173. The reversal of 26128136164 is 46163182162.

It is a happy number.

The square root of 26128136164 is 161642.

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

It can be written as a sum of positive squares in 4 ways, for example, as 540934564 + 25587201600 = 23258^2 + 159960^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4199584 + ... + 4205800.

Almost surely, 2^26128136164 is an apocalyptic number.

26128136164 is the 161642-nd square number.

It is an amenable number.

26128136164 is a deficient number, since it is larger than the sum of its proper divisors (23391874103).

26128136164 is an frugal number, since it uses more digits than its factorization.

26128136164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12464 (or 6232 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The spelling of 26128136164 in words is "twenty-six billion, one hundred twenty-eight million, one hundred thirty-six thousand, one hundred sixty-four".