11720982505 has 16 divisors (see below), whose sum is σ = 14710823424. Its totient is φ = 8948251840.

The previous prime is 11720982491. The next prime is 11720982509. The reversal of 11720982505 is 50528902711.

It is not a de Polignac number, because 11720982505 - 2¹¹ = 11720980457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11720982509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68674 + ... + 167803.

It is an arithmetic number, because the mean of its divisors is an integer number (919426464).

Almost surely, 2^11720982505 is an apocalyptic number.

It is an amenable number.

11720982505 is a deficient number, since it is larger than the sum of its proper divisors (2989840919).

11720982505 is a wasteful number, since it uses less digits than its factorization.

11720982505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236936.

The product of its (nonzero) digits is 50400, while the sum is 40.

The spelling of 11720982505 in words is "eleven billion, seven hundred twenty million, nine hundred eighty-two thousand, five hundred five".