399972061218 has 32 divisors (see below), whose sum is σ = 835721789760. Its totient is φ = 127452113600.

The previous prime is 399972061183. The next prime is 399972061241. The reversal of 399972061218 is 812160279993.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11362080 + ... + 11397227.

It is an arithmetic number, because the mean of its divisors is an integer number (26116305930).

Almost surely, 2^399972061218 is an apocalyptic number.

399972061218 is an abundant number, since it is smaller than the sum of its proper divisors (435749728542).

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

399972061218 is a wasteful number, since it uses less digits than its factorization.

399972061218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22759442.

The product of its (nonzero) digits is 2939328, while the sum is 57.

The spelling of 399972061218 in words is "three hundred ninety-nine billion, nine hundred seventy-two million, sixty-one thousand, two hundred eighteen".