26656370464 has 72 divisors (see below), whose sum is σ = 56176476048. Its totient is φ = 12447851520.

The previous prime is 26656370449. The next prime is 26656370479. The reversal of 26656370464 is 46407365662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (26656370449) and next prime (26656370479).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1200487 + ... + 1222489.

It is an arithmetic number, because the mean of its divisors is an integer number (780228834).

Almost surely, 2^26656370464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26656370464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28088238024).

26656370464 is an abundant number, since it is smaller than the sum of its proper divisors (29520105584).

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

26656370464 is a wasteful number, since it uses less digits than its factorization.

26656370464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22178 (or 22153 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 49.

The spelling of 26656370464 in words is "twenty-six billion, six hundred fifty-six million, three hundred seventy thousand, four hundred sixty-four".