26989656320 has 144 divisors (see below), whose sum is σ = 71227840320. Its totient is φ = 9716736000.

The previous prime is 26989656311. The next prime is 26989656359. The reversal of 26989656320 is 2365698962.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1412591 + ... + 1431569.

It is an arithmetic number, because the mean of its divisors is an integer number (494637780).

Almost surely, 2^26989656320 is an apocalyptic number.

26989656320 is a gapful number since it is divisible by the number (20) 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 26989656320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35613920160).

26989656320 is an abundant number, since it is smaller than the sum of its proper divisors (44238184000).

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

26989656320 is a wasteful number, since it uses less digits than its factorization.

26989656320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19112 (or 19098 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 56.

The spelling of 26989656320 in words is "twenty-six billion, nine hundred eighty-nine million, six hundred fifty-six thousand, three hundred twenty".