11778558065 has 16 divisors (see below), whose sum is σ = 14473272000. Its totient is φ = 9197157312.

The previous prime is 11778558049. The next prime is 11778558073. The reversal of 11778558065 is 56085587711.

It is a cyclic number.

It is not a de Polignac number, because 11778558065 - 2⁴ = 11778558049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11778557998 and 11778558016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294911 + ... + 332459.

It is an arithmetic number, because the mean of its divisors is an integer number (904579500).

Almost surely, 2^11778558065 is an apocalyptic number.

It is an amenable number.

11778558065 is a deficient number, since it is larger than the sum of its proper divisors (2694713935).

11778558065 is a wasteful number, since it uses less digits than its factorization.

11778558065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39056.

The product of its (nonzero) digits is 2352000, while the sum is 53.

The spelling of 11778558065 in words is "eleven billion, seven hundred seventy-eight million, five hundred fifty-eight thousand, sixty-five".