26421653644 has 12 divisors (see below), whose sum is σ = 46239043984. Its totient is φ = 13210498224.

The previous prime is 26421653641. The next prime is 26421653717. The reversal of 26421653644 is 44635612462.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 26421653644.

It is not an unprimeable number, because it can be changed into a prime (26421653641) 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, 233674 + ... + 327790.

Almost surely, 2^26421653644 is an apocalyptic number.

It is an amenable number.

26421653644 is a deficient number, since it is larger than the sum of its proper divisors (19817390340).

26421653644 is a wasteful number, since it uses less digits than its factorization.

26421653644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164304 (or 164302 counting only the distinct ones).

The product of its digits is 829440, while the sum is 43.

The spelling of 26421653644 in words is "twenty-six billion, four hundred twenty-one million, six hundred fifty-three thousand, six hundred forty-four".