26448191641 has 3 divisors (see below), whose sum is σ = 26448354271. Its totient is φ = 26448029012.

The previous prime is 26448191633. The next prime is 26448191659. The reversal of 26448191641 is 14619184462.

The square root of 26448191641 is 162629.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 23771164041 + 2677027600 = 154179^2 + 51740^2 .

It is not a de Polignac number, because 26448191641 - 2³ = 26448191633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26448191591 and 26448191600.

It is not an unprimeable number, because it can be changed into a prime (26448191681) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 81315 + ... + 243943.

Almost surely, 2^26448191641 is an apocalyptic number.

26448191641 is the 162629-th square number.

26448191641 is the 81315-th centered octagonal number.

It is an amenable number.

26448191641 is a deficient number, since it is larger than the sum of its proper divisors (162630).

26448191641 is an frugal number, since it uses more digits than its factorization.

26448191641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325258 (or 162629 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

It can be divided in two parts, 26448 and 191641, that added together give a square (218089 = 467²).

The spelling of 26448191641 in words is "twenty-six billion, four hundred forty-eight million, one hundred ninety-one thousand, six hundred forty-one".