26564321235540 has 96 divisors (see below), whose sum is σ = 81945312301440. Its totient is φ = 6376074688000.

The previous prime is 26564321235511. The next prime is 26564321235541. The reversal of 26564321235540 is 4553212346562.

It is a super-2 number, since 2×26564321235540² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26564321235540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26564321235541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199185675 + ... + 199318994.

It is an arithmetic number, because the mean of its divisors is an integer number (853597003140).

Almost surely, 2^{26564321235540} is an apocalyptic number.

26564321235540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26564321235540 is an abundant number, since it is smaller than the sum of its proper divisors (55380991065900).

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

26564321235540 is a wasteful number, since it uses less digits than its factorization.

26564321235540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398504793 (or 398504791 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 48.

The spelling of 26564321235540 in words is "twenty-six trillion, five hundred sixty-four billion, three hundred twenty-one million, two hundred thirty-five thousand, five hundred forty".