216403540412040 has 48 divisors (see below), whose sum is σ = 703311506340300. Its totient is φ = 57707610776448.

The previous prime is 216403540411991. The next prime is 216403540412051. The reversal of 216403540412040 is 40214045304612.

216403540412040 is a `hidden beast` number, since 2 + 1 + 6 + 40 + 3 + 5 + 404 + 1 + 204 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 204737121415044 + 11666418996996 = 14308638^2 + 3415614^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 216403540411986 and 216403540412004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 300560472435 + ... + 300560473154.

Almost surely, 2^{216403540412040} is an apocalyptic number.

216403540412040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216403540412040 is an abundant number, since it is smaller than the sum of its proper divisors (486907965928260).

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

216403540412040 is a wasteful number, since it uses less digits than its factorization.

216403540412040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601120945606 (or 601120945599 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

Adding to 216403540412040 its reverse (40214045304612), we get a palindrome (256617585716652).

The spelling of 216403540412040 in words is "two hundred sixteen trillion, four hundred three billion, five hundred forty million, four hundred twelve thousand, forty".