26420055440 has 40 divisors (see below), whose sum is σ = 61875024120. Its totient is φ = 10490878976.

The previous prime is 26420055439. The next prime is 26420055469. The reversal of 26420055440 is 4455002462.

It can be written as a sum of positive squares in 4 ways, for example, as 1596162304 + 24823893136 = 39952^2 + 157556^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 26420055397 and 26420055406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1194335 + ... + 1216254.

It is an arithmetic number, because the mean of its divisors is an integer number (1546875603).

Almost surely, 2^26420055440 is an apocalyptic number.

26420055440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26420055440 is an abundant number, since it is smaller than the sum of its proper divisors (35454968680).

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

26420055440 is a wasteful number, since it uses less digits than its factorization.

26420055440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410739 (or 2410733 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

The spelling of 26420055440 in words is "twenty-six billion, four hundred twenty million, fifty-five thousand, four hundred forty".