26955557280 has 144 divisors (see below), whose sum is σ = 92453745384. Its totient is φ = 7151585280.

The previous prime is 26955557261. The next prime is 26955557281. The reversal of 26955557280 is 8275555962.

It is a happy number.

26955557280 is a `hidden beast` number, since 2 + 6 + 9 + 5 + 5 + 557 + 2 + 80 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 26489515536 + 466041744 = 162756^2 + 21588^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (26955557281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236170 + ... + 331190.

Almost surely, 2^26955557280 is an apocalyptic number.

26955557280 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 26955557280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46226872692).

26955557280 is an abundant number, since it is smaller than the sum of its proper divisors (65498188104).

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

26955557280 is a wasteful number, since it uses less digits than its factorization.

26955557280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95239 (or 95228 counting only the distinct ones).

The product of its (nonzero) digits is 7560000, while the sum is 54.

The spelling of 26955557280 in words is "twenty-six billion, nine hundred fifty-five million, five hundred fifty-seven thousand, two hundred eighty".