11778950685 has 16 divisors (see below), whose sum is σ = 18867685824. Its totient is φ = 6274985472.

The previous prime is 11778950683. The next prime is 11778950723. The reversal of 11778950685 is 58605987711.

It is not a de Polignac number, because 11778950685 - 2¹ = 11778950683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11778950683) 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, 431412 + ... + 457901.

It is an arithmetic number, because the mean of its divisors is an integer number (1179230364).

Almost surely, 2^11778950685 is an apocalyptic number.

11778950685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11778950685 is a deficient number, since it is larger than the sum of its proper divisors (7088735139).

11778950685 is an equidigital number, since it uses as much as digits as its factorization.

11778950685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890204.

The product of its (nonzero) digits is 4233600, while the sum is 57.

The spelling of 11778950685 in words is "eleven billion, seven hundred seventy-eight million, nine hundred fifty thousand, six hundred eighty-five".