216696906161357 has 16 divisors (see below), whose sum is σ = 235124199647280. Its totient is φ = 198945256952832.

The previous prime is 216696906161321. The next prime is 216696906161363. The reversal of 216696906161357 is 753161609696612.

It can be written as a sum of positive squares in 8 ways, for example, as 81777042680356 + 134919863481001 = 9043066^2 + 11615501^2 .

It is not a de Polignac number, because 216696906161357 - 2⁴⁰ = 215597394533581 is a prime.

It is a super-2 number, since 2×216696906161357² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216696906151357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 694951382 + ... + 695263127.

It is an arithmetic number, because the mean of its divisors is an integer number (14695262477955).

Almost surely, 2^{216696906161357} is an apocalyptic number.

It is an amenable number.

216696906161357 is a deficient number, since it is larger than the sum of its proper divisors (18427293485923).

216696906161357 is a wasteful number, since it uses less digits than its factorization.

216696906161357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390214752.

The product of its (nonzero) digits is 132269760, while the sum is 68.

The spelling of 216696906161357 in words is "two hundred sixteen trillion, six hundred ninety-six billion, nine hundred six million, one hundred sixty-one thousand, three hundred fifty-seven".