26494598664 has 128 divisors (see below), whose sum is σ = 75098275200. Its totient is φ = 8651784960.

The previous prime is 26494598623. The next prime is 26494598681. The reversal of 26494598664 is 46689549462.

26494598664 is a `hidden beast` number, since 2 + 6 + 49 + 459 + 86 + 64 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10107274 + ... + 10109894.

It is an arithmetic number, because the mean of its divisors is an integer number (586705275).

Almost surely, 2^26494598664 is an apocalyptic number.

26494598664 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 26494598664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37549137600).

26494598664 is an abundant number, since it is smaller than the sum of its proper divisors (48603676536).

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

26494598664 is a wasteful number, since it uses less digits than its factorization.

26494598664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3572 (or 3562 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 63.

It can be divided in two parts, 264945 and 98664, that added together give a square (363609 = 603²).

The spelling of 26494598664 in words is "twenty-six billion, four hundred ninety-four million, five hundred ninety-eight thousand, six hundred sixty-four".