11826785378 has 4 divisors (see below), whose sum is σ = 17740178070. Its totient is φ = 5913392688.

The previous prime is 11826785309. The next prime is 11826785389. The reversal of 11826785378 is 87358762811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87358762811 = 137 ⋅637655203.

It can be written as a sum of positive squares in only one way, i.e., 8748422089 + 3078363289 = 93533^2 + 55483^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2956696343 + ... + 2956696346.

Almost surely, 2^11826785378 is an apocalyptic number.

11826785378 is a deficient number, since it is larger than the sum of its proper divisors (5913392692).

11826785378 is an equidigital number, since it uses as much as digits as its factorization.

11826785378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5913392691.

The product of its digits is 4515840, while the sum is 56.

The spelling of 11826785378 in words is "eleven billion, eight hundred twenty-six million, seven hundred eighty-five thousand, three hundred seventy-eight".