216405020741832 has 128 divisors (see below), whose sum is σ = 647370621878400. Its totient is φ = 66585627922176.

The previous prime is 216405020741827. The next prime is 216405020741857. The reversal of 216405020741832 is 238147020504612.

216405020741832 is a `hidden beast` number, since 2 + 1 + 6 + 40 + 502 + 0 + 74 + 1 + 8 + 32 = 666.

It is a super-2 number, since 2×216405020741832² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 489867883 + ... + 490309445.

It is an arithmetic number, because the mean of its divisors is an integer number (5057582983425).

Almost surely, 2^{216405020741832} is an apocalyptic number.

It is an amenable number.

216405020741832 is an abundant number, since it is smaller than the sum of its proper divisors (430965601136568).

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

216405020741832 is a wasteful number, since it uses less digits than its factorization.

216405020741832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616124 (or 616114 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 216405020741832 in words is "two hundred sixteen trillion, four hundred five billion, twenty million, seven hundred forty-one thousand, eight hundred thirty-two".