26909257808040 has 128 divisors (see below), whose sum is σ = 85544910000000. Its totient is φ = 6748288155648.

The previous prime is 26909257808039. The next prime is 26909257808077. The reversal of 26909257808040 is 4080875290962.

It is a Harshad number since it is a multiple of its sum of digits (60).

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 31 ways as a sum of consecutive naturals, for example, 2732590 + ... + 7828509.

It is an arithmetic number, because the mean of its divisors is an integer number (668319609375).

Almost surely, 2^{26909257808040} is an apocalyptic number.

26909257808040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26909257808040 is an abundant number, since it is smaller than the sum of its proper divisors (58635652191960).

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

26909257808040 is a wasteful number, since it uses less digits than its factorization.

26909257808040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10562379 (or 10562375 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 26909257808040 in words is "twenty-six trillion, nine hundred nine billion, two hundred fifty-seven million, eight hundred eight thousand, forty".