216408034620 has 72 divisors (see below), whose sum is σ = 656479671120. Its totient is φ = 57705120000.

The previous prime is 216408034607. The next prime is 216408034631. The reversal of 216408034620 is 26430804612.

216408034620 is a `hidden beast` number, since 2 + 1 + 640 + 8 + 0 + 3 + 4 + 6 + 2 + 0 = 666.

216408034620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216408034620² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 3907120 + ... + 3962120.

It is an arithmetic number, because the mean of its divisors is an integer number (9117773210).

Almost surely, 2^216408034620 is an apocalyptic number.

216408034620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216408034620 is an abundant number, since it is smaller than the sum of its proper divisors (440071636500).

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

216408034620 is a wasteful number, since it uses less digits than its factorization.

216408034620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76875 (or 76870 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The spelling of 216408034620 in words is "two hundred sixteen billion, four hundred eight million, thirty-four thousand, six hundred twenty".