26530646140 has 24 divisors (see below), whose sum is σ = 55717421760. Its totient is φ = 10611674688.

The previous prime is 26530646123. The next prime is 26530646141. The reversal of 26530646140 is 4164603562.

It is a self number, because there is not a number n which added to its sum of digits gives 26530646140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26530646141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 667054 + ... + 705706.

It is an arithmetic number, because the mean of its divisors is an integer number (2321559240).

Almost surely, 2^26530646140 is an apocalyptic number.

26530646140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26530646140 is an abundant number, since it is smaller than the sum of its proper divisors (29186775620).

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

26530646140 is a wasteful number, since it uses less digits than its factorization.

26530646140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72981 (or 72979 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 26530646140 in words is "twenty-six billion, five hundred thirty million, six hundred forty-six thousand, one hundred forty".