26144643264 has 224 divisors, whose sum is σ = 77865914880. Its totient is φ = 7693221888.

The previous prime is 26144643263. The next prime is 26144643347. The reversal of 26144643264 is 46234644162.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (26144643263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6385602 + ... + 6389694.

Almost surely, 2^26144643264 is an apocalyptic number.

26144643264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26144643264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38932957440).

26144643264 is an abundant number, since it is smaller than the sum of its proper divisors (51721271616).

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

26144643264 is a wasteful number, since it uses less digits than its factorization.

26144643264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4247 (or 4237 counting only the distinct ones).

The product of its digits is 663552, while the sum is 42.

The spelling of 26144643264 in words is "twenty-six billion, one hundred forty-four million, six hundred forty-three thousand, two hundred sixty-four".