11778542211 has 8 divisors (see below), whose sum is σ = 15705269584. Its totient is φ = 7852088160.

The previous prime is 11778542203. The next prime is 11778542221. The reversal of 11778542211 is 11224587711.

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

It is not a de Polignac number, because 11778542211 - 2³ = 11778542203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11778542211.

It is not an unprimeable number, because it can be changed into a prime (11778542221) 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, 75441 + ... + 171021.

It is an arithmetic number, because the mean of its divisors is an integer number (1963158698).

Almost surely, 2^11778542211 is an apocalyptic number.

11778542211 is a deficient number, since it is larger than the sum of its proper divisors (3926727373).

11778542211 is an equidigital number, since it uses as much as digits as its factorization.

11778542211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136661.

The product of its digits is 31360, while the sum is 39.

The spelling of 11778542211 in words is "eleven billion, seven hundred seventy-eight million, five hundred forty-two thousand, two hundred eleven".