2778143643216 has 80 divisors (see below), whose sum is σ = 8023223494720. Its totient is φ = 920366582400.

The previous prime is 2778143643137. The next prime is 2778143643221. The reversal of 2778143643216 is 6123463418772.

2778143643216 is a `hidden beast` number, since 2 + 77 + 81 + 436 + 43 + 21 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19656235 + ... + 19797066.

It is an arithmetic number, because the mean of its divisors is an integer number (100290293684).

Almost surely, 2^{2778143643216} is an apocalyptic number.

It is an amenable number.

2778143643216 is an abundant number, since it is smaller than the sum of its proper divisors (5245079851504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2778143643216 is a wasteful number, since it uses less digits than its factorization.

2778143643216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39453481 (or 39453469 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 54.

The spelling of 2778143643216 in words is "two trillion, seven hundred seventy-eight billion, one hundred forty-three million, six hundred forty-three thousand, two hundred sixteen".