26425889821 has 4 divisors (see below), whose sum is σ = 26426947644. Its totient is φ = 26424832000.

The previous prime is 26425889807. The next prime is 26425889873. The reversal of 26425889821 is 12898852462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24810975225 + 1614914596 = 157515^2 + 40186^2 .

It is a cyclic number.

It is not a de Polignac number, because 26425889821 - 2¹¹ = 26425887773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26425889221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490510 + ... + 541711.

It is an arithmetic number, because the mean of its divisors is an integer number (6606736911).

Almost surely, 2^26425889821 is an apocalyptic number.

It is an amenable number.

26425889821 is a deficient number, since it is larger than the sum of its proper divisors (1057823).

26425889821 is a wasteful number, since it uses less digits than its factorization.

26425889821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057822.

The product of its digits is 4423680, while the sum is 55.

The spelling of 26425889821 in words is "twenty-six billion, four hundred twenty-five million, eight hundred eighty-nine thousand, eight hundred twenty-one".