190438245194 has 4 divisors (see below), whose sum is σ = 285657367794. Its totient is φ = 95219122596.

The previous prime is 190438245149. The next prime is 190438245197. The reversal of 190438245194 is 491542834091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 491542834091 = 1583 ⋅310513477.

It can be written as a sum of positive squares in only one way, i.e., 168520923169 + 21917322025 = 410513^2 + 148045^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (190438245197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47609561297 + ... + 47609561300.

Almost surely, 2^190438245194 is an apocalyptic number.

190438245194 is a deficient number, since it is larger than the sum of its proper divisors (95219122600).

190438245194 is an equidigital number, since it uses as much as digits as its factorization.

190438245194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95219122599.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 190438245194 in words is "one hundred ninety billion, four hundred thirty-eight million, two hundred forty-five thousand, one hundred ninety-four".