216115425868564 has 12 divisors (see below), whose sum is σ = 378839772669204. Its totient is φ = 107875490820224.

The previous prime is 216115425868541. The next prime is 216115425868579. The reversal of 216115425868564 is 465868524511612.

It can be written as a sum of positive squares in 2 ways, for example, as 63626466624400 + 152488959244164 = 7976620^2 + 12348642^2 .

It is a junction number, because it is equal to n+sod(n) for n = 216115425868496 and 216115425868505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45555525847 + ... + 45555530590.

It is an arithmetic number, because the mean of its divisors is an integer number (31569981055767).

Almost surely, 2^{216115425868564} is an apocalyptic number.

It is an amenable number.

216115425868564 is a deficient number, since it is larger than the sum of its proper divisors (162724346800640).

216115425868564 is a wasteful number, since it uses less digits than its factorization.

216115425868564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91111057034 (or 91111057032 counting only the distinct ones).

The product of its digits is 110592000, while the sum is 64.

The spelling of 216115425868564 in words is "two hundred sixteen trillion, one hundred fifteen billion, four hundred twenty-five million, eight hundred sixty-eight thousand, five hundred sixty-four".