26500780803 has 128 divisors (see below), whose sum is σ = 48244654080. Its totient is φ = 12563527680.

The previous prime is 26500780799. The next prime is 26500780819. The reversal of 26500780803 is 30808700562.

It is not a de Polignac number, because 26500780803 - 2² = 26500780799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26500700803) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5770038 + ... + 5774628.

It is an arithmetic number, because the mean of its divisors is an integer number (376911360).

Almost surely, 2^26500780803 is an apocalyptic number.

26500780803 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

26500780803 is a deficient number, since it is larger than the sum of its proper divisors (21743873277).

26500780803 is a wasteful number, since it uses less digits than its factorization.

26500780803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4697.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 26500780803 in words is "twenty-six billion, five hundred million, seven hundred eighty thousand, eight hundred three".