26507489640 has 64 divisors (see below), whose sum is σ = 79655002560. Its totient is φ = 7056883200.

The previous prime is 26507489611. The next prime is 26507489647. The reversal of 26507489640 is 4698470562.

It is not an unprimeable number, because it can be changed into a prime (26507489647) 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 15 ways as a sum of consecutive naturals, for example, 111654 + ... + 255893.

It is an arithmetic number, because the mean of its divisors is an integer number (1244609415).

Almost surely, 2^26507489640 is an apocalyptic number.

26507489640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26507489640 is an abundant number, since it is smaller than the sum of its proper divisors (53147512920).

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

26507489640 is a wasteful number, since it uses less digits than its factorization.

26507489640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368162 (or 368158 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 26507489640 in words is "twenty-six billion, five hundred seven million, four hundred eighty-nine thousand, six hundred forty".