26509350452640 has 96 divisors (see below), whose sum is σ = 91095767937216. Its totient is φ = 6426509199360.

The previous prime is 26509350452609. The next prime is 26509350452657. The reversal of 26509350452640 is 4625405390562.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×26509350452640² (a number of 28 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 2510349877 + ... + 2510360436.

It is an arithmetic number, because the mean of its divisors is an integer number (948914249346).

Almost surely, 2^{26509350452640} is an apocalyptic number.

26509350452640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26509350452640 is an abundant number, since it is smaller than the sum of its proper divisors (64586417484576).

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

26509350452640 is a wasteful number, since it uses less digits than its factorization.

26509350452640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5020710342 (or 5020710334 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 51.

The spelling of 26509350452640 in words is "twenty-six trillion, five hundred nine billion, three hundred fifty million, four hundred fifty-two thousand, six hundred forty".