196645028649 has 4 divisors (see below), whose sum is σ = 262193371536. Its totient is φ = 131096685764.

The previous prime is 196645028599. The next prime is 196645028681. The reversal of 196645028649 is 946820546691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 196645028649 - 2¹² = 196645024553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 196645028592 and 196645028601.

It is not an unprimeable number, because it can be changed into a prime (196645021649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32774171439 + ... + 32774171444.

It is an arithmetic number, because the mean of its divisors is an integer number (65548342884).

Almost surely, 2^196645028649 is an apocalyptic number.

It is an amenable number.

196645028649 is a deficient number, since it is larger than the sum of its proper divisors (65548342887).

196645028649 is an equidigital number, since it uses as much as digits as its factorization.

196645028649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65548342886.

The product of its (nonzero) digits is 22394880, while the sum is 60.

The spelling of 196645028649 in words is "one hundred ninety-six billion, six hundred forty-five million, twenty-eight thousand, six hundred forty-nine".