196158100251 has 4 divisors (see below), whose sum is σ = 261544133672. Its totient is φ = 130772066832.

The previous prime is 196158100231. The next prime is 196158100261. The reversal of 196158100251 is 152001851691.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 196158100251 - 2¹⁰ = 196158099227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196158100231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32693016706 + ... + 32693016711.

It is an arithmetic number, because the mean of its divisors is an integer number (65386033418).

Almost surely, 2^196158100251 is an apocalyptic number.

196158100251 is a deficient number, since it is larger than the sum of its proper divisors (65386033421).

196158100251 is an equidigital number, since it uses as much as digits as its factorization.

196158100251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65386033420.

The product of its (nonzero) digits is 21600, while the sum is 39.

The spelling of 196158100251 in words is "one hundred ninety-six billion, one hundred fifty-eight million, one hundred thousand, two hundred fifty-one".