2211378438888 has 64 divisors (see below), whose sum is σ = 6145601716800. Its totient is φ = 736780086720.

The previous prime is 2211378438887. The next prime is 2211378438911. The reversal of 2211378438888 is 8888348731122.

2211378438888 is a `hidden beast` number, since 2 + 2 + 113 + 7 + 8 + 438 + 8 + 88 = 666.

It is a super-4 number, since 4×2211378438888⁴ (a number of 50 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (2211378438887) 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, 1941831 + ... + 2862422.

It is an arithmetic number, because the mean of its divisors is an integer number (96025026825).

Almost surely, 2^{2211378438888} is an apocalyptic number.

It is an amenable number.

2211378438888 is an abundant number, since it is smaller than the sum of its proper divisors (3934223277912).

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

2211378438888 is a wasteful number, since it uses less digits than its factorization.

2211378438888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4806399 (or 4806389 counting only the distinct ones).

The product of its digits is 33030144, while the sum is 63.

The spelling of 2211378438888 in words is "two trillion, two hundred eleven billion, three hundred seventy-eight million, four hundred thirty-eight thousand, eight hundred eighty-eight".