216376226371765 has 8 divisors (see below), whose sum is σ = 259652728327608. Its totient is φ = 173100143309760.

The previous prime is 216376226371741. The next prime is 216376226371769. The reversal of 216376226371765 is 567173622673612.

It can be written as a sum of positive squares in 4 ways, for example, as 23764074775281 + 192612151596484 = 4874841^2 + 13878478^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216376226371765 - 2⁷ = 216376226371637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216376226371697 and 216376226371706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216376226371769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103585942 + ... + 105654151.

It is an arithmetic number, because the mean of its divisors is an integer number (32456591040951).

Almost surely, 2^{216376226371765} is an apocalyptic number.

It is an amenable number.

216376226371765 is a deficient number, since it is larger than the sum of its proper divisors (43276501955843).

216376226371765 is a wasteful number, since it uses less digits than its factorization.

216376226371765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209446919.

The product of its digits is 160030080, while the sum is 64.

The spelling of 216376226371765 in words is "two hundred sixteen trillion, three hundred seventy-six billion, two hundred twenty-six million, three hundred seventy-one thousand, seven hundred sixty-five".