4001218682878 has 16 divisors (see below), whose sum is σ = 6092840676240. Its totient is φ = 1970285841216.

The previous prime is 4001218682869. The next prime is 4001218682933. The reversal of 4001218682878 is 8782868121004.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2940543 + ... + 4080346.

It is an arithmetic number, because the mean of its divisors is an integer number (380802542265).

Almost surely, 2^{4001218682878} is an apocalyptic number.

4001218682878 is a deficient number, since it is larger than the sum of its proper divisors (2091621993362).

4001218682878 is a wasteful number, since it uses less digits than its factorization.

4001218682878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7025211.

The product of its (nonzero) digits is 2752512, while the sum is 55.

The spelling of 4001218682878 in words is "four trillion, one billion, two hundred eighteen million, six hundred eighty-two thousand, eight hundred seventy-eight".