11964878565 has 16 divisors (see below), whose sum is σ = 19322722368. Its totient is φ = 6321629696.

The previous prime is 11964878543. The next prime is 11964878591. The reversal of 11964878565 is 56587846911.

11964878565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11964878565 - 2¹⁴ = 11964862181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11964878499 and 11964878508.

It is a congruent number.

It is an unprimeable number.

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, 3725772 + ... + 3728981.

It is an arithmetic number, because the mean of its divisors is an integer number (1207670148).

Almost surely, 2^11964878565 is an apocalyptic number.

11964878565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11964878565 is a deficient number, since it is larger than the sum of its proper divisors (7357843803).

11964878565 is a wasteful number, since it uses less digits than its factorization.

11964878565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7454868.

The product of its digits is 14515200, while the sum is 60.

The spelling of 11964878565 in words is "eleven billion, nine hundred sixty-four million, eight hundred seventy-eight thousand, five hundred sixty-five".