26512891526640 has 40 divisors (see below), whose sum is σ = 82189963733328. Its totient is φ = 7070104407040.

The previous prime is 26512891526629. The next prime is 26512891526651. The reversal of 26512891526640 is 4662519821562.

It is an interprime number because it is at equal distance from previous prime (26512891526629) and next prime (26512891526651).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55235190441 + ... + 55235190920.

Almost surely, 2^{26512891526640} is an apocalyptic number.

26512891526640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26512891526640 is an abundant number, since it is smaller than the sum of its proper divisors (55677072206688).

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

26512891526640 is a wasteful number, since it uses less digits than its factorization.

26512891526640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110470381377 (or 110470381371 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 57.

The spelling of 26512891526640 in words is "twenty-six trillion, five hundred twelve billion, eight hundred ninety-one million, five hundred twenty-six thousand, six hundred forty".