11778506851 has 8 divisors (see below), whose sum is σ = 12127330640. Its totient is φ = 11431287648.

The previous prime is 11778506849. The next prime is 11778506867. The reversal of 11778506851 is 15860587711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11778506851 - 2¹ = 11778506849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11778506795 and 11778506804.

It is not an unprimeable number, because it can be changed into a prime (11778506881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386241 + ... + 415618.

It is an arithmetic number, because the mean of its divisors is an integer number (1515916330).

Almost surely, 2^11778506851 is an apocalyptic number.

11778506851 is a deficient number, since it is larger than the sum of its proper divisors (348823789).

11778506851 is an equidigital number, since it uses as much as digits as its factorization.

11778506851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802293.

The product of its (nonzero) digits is 470400, while the sum is 49.

The spelling of 11778506851 in words is "eleven billion, seven hundred seventy-eight million, five hundred six thousand, eight hundred fifty-one".