26505430506 has 24 divisors (see below), whose sum is σ = 59925322080. Its totient is φ = 8451006696.

The previous prime is 26505430499. The next prime is 26505430649. The reversal of 26505430506 is 60503450562.

It is a happy number.

26505430506 is a `hidden beast` number, since 2 + 65 + 0 + 543 + 0 + 50 + 6 = 666.

It is a super-3 number, since 3×26505430506³ (a number of 32 digits) contains 333 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 11 ways as a sum of consecutive naturals, for example, 32010976 + ... + 32011803.

It is an arithmetic number, because the mean of its divisors is an integer number (2496888420).

Almost surely, 2^26505430506 is an apocalyptic number.

26505430506 is an abundant number, since it is smaller than the sum of its proper divisors (33419891574).

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

26505430506 is a wasteful number, since it uses less digits than its factorization.

26505430506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64022810 (or 64022807 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 26505430506 in words is "twenty-six billion, five hundred five million, four hundred thirty thousand, five hundred six".