196518881865 has 16 divisors (see below), whose sum is σ = 321742542528. Its totient is φ = 102372626496.

The previous prime is 196518881861. The next prime is 196518881869. The reversal of 196518881865 is 568188815691.

It is an interprime number because it is at equal distance from previous prime (196518881861) and next prime (196518881869).

It is not a de Polignac number, because 196518881865 - 2² = 196518881861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 196518881796 and 196518881805.

It is not an unprimeable number, because it can be changed into a prime (196518881861) 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, 152339574 + ... + 152340863.

It is an arithmetic number, because the mean of its divisors is an integer number (20108908908).

Almost surely, 2^196518881865 is an apocalyptic number.

196518881865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

196518881865 is a deficient number, since it is larger than the sum of its proper divisors (125223660663).

196518881865 is a wasteful number, since it uses less digits than its factorization.

196518881865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304680488.

The product of its digits is 33177600, while the sum is 66.

The spelling of 196518881865 in words is "one hundred ninety-six billion, five hundred eighteen million, eight hundred eighty-one thousand, eight hundred sixty-five".