26509046509 has 32 divisors (see below), whose sum is σ = 30932399232. Its totient is φ = 22638035200.

The previous prime is 26509046503. The next prime is 26509046521. The reversal of 26509046509 is 90564090562.

It is a de Polignac number, because none of the positive numbers 2^k-26509046509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26509046503) 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, 18576054 + ... + 18577480.

It is an arithmetic number, because the mean of its divisors is an integer number (966637476).

Almost surely, 2^26509046509 is an apocalyptic number.

It is an amenable number.

26509046509 is a deficient number, since it is larger than the sum of its proper divisors (4423352723).

26509046509 is a wasteful number, since it uses less digits than its factorization.

26509046509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2298 (or 2276 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 46.

The spelling of 26509046509 in words is "twenty-six billion, five hundred nine million, forty-six thousand, five hundred nine".