11714643778 has 8 divisors (see below), whose sum is σ = 18046883772. Its totient is φ = 5699015856.

The previous prime is 11714643767. The next prime is 11714643799. The reversal of 11714643778 is 87734641711.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10447497369 + 1267146409 = 102213^2 + 35597^2 .

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

It is a super-2 number, since 2×11714643778² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79152925 + ... + 79153072.

Almost surely, 2^11714643778 is an apocalyptic number.

11714643778 is a deficient number, since it is larger than the sum of its proper divisors (6332239994).

11714643778 is a wasteful number, since it uses less digits than its factorization.

11714643778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158306036.

The product of its digits is 790272, while the sum is 49.

The spelling of 11714643778 in words is "eleven billion, seven hundred fourteen million, six hundred forty-three thousand, seven hundred seventy-eight".