196718811965 has 16 divisors (see below), whose sum is σ = 255625786416. Its totient is φ = 144466675200.

The previous prime is 196718811959. The next prime is 196718812001. The reversal of 196718811965 is 569118817691.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 132487992121 + 64230819844 = 363989^2 + 253438^2 .

It is not a de Polignac number, because 196718811965 - 2¹⁶ = 196718746429 is a prime.

It is a super-2 number, since 2×196718811965² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 196718811898 and 196718811907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8348576 + ... + 8372105.

It is an arithmetic number, because the mean of its divisors is an integer number (15976611651).

Almost surely, 2^196718811965 is an apocalyptic number.

It is an amenable number.

196718811965 is a deficient number, since it is larger than the sum of its proper divisors (58906974451).

196718811965 is a wasteful number, since it uses less digits than its factorization.

196718811965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16720880.

The product of its digits is 6531840, while the sum is 62.

The spelling of 196718811965 in words is "one hundred ninety-six billion, seven hundred eighteen million, eight hundred eleven thousand, nine hundred sixty-five".