216401344974 has 48 divisors (see below), whose sum is σ = 484523932464. Its totient is φ = 69758640000.

The previous prime is 216401344969. The next prime is 216401345029. The reversal of 216401344974 is 479443104612.

216401344974 is a `hidden beast` number, since 21 + 6 + 4 + 0 + 134 + 497 + 4 = 666.

216401344974 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23 ways as a sum of consecutive naturals, for example, 1305927 + ... + 1462274.

It is an arithmetic number, because the mean of its divisors is an integer number (10094248593).

Almost surely, 2^216401344974 is an apocalyptic number.

216401344974 is an abundant number, since it is smaller than the sum of its proper divisors (268122587490).

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

216401344974 is a wasteful number, since it uses less digits than its factorization.

216401344974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768353 (or 2768350 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 216401344974 in words is "two hundred sixteen billion, four hundred one million, three hundred forty-four thousand, nine hundred seventy-four".