196458216251 has 16 divisors (see below), whose sum is σ = 219600527328. Its totient is φ = 174198508800.

The previous prime is 196458216247. The next prime is 196458216257. The reversal of 196458216251 is 152612854691.

It is a cyclic number.

It is not a de Polignac number, because 196458216251 - 2² = 196458216247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196458216251.

It is not an unprimeable number, because it can be changed into a prime (196458216257) 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, 1811285 + ... + 1916681.

It is an arithmetic number, because the mean of its divisors is an integer number (13725032958).

Almost surely, 2^196458216251 is an apocalyptic number.

196458216251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

196458216251 is a deficient number, since it is larger than the sum of its proper divisors (23142311077).

196458216251 is a wasteful number, since it uses less digits than its factorization.

196458216251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109582.

The product of its digits is 1036800, while the sum is 50.

The spelling of 196458216251 in words is "one hundred ninety-six billion, four hundred fifty-eight million, two hundred sixteen thousand, two hundred fifty-one".