7842144194 has 4 divisors (see below), whose sum is σ = 11763216294. Its totient is φ = 3921072096.

The previous prime is 7842144187. The next prime is 7842144197. The reversal of 7842144194 is 4914412487.

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

It can be written as a sum of positive squares in only one way, i.e., 6982774969 + 859369225 = 83563^2 + 29315^2 .

It is a super-2 number, since 2×7842144194² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7842144197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1960536047 + ... + 1960536050.

Almost surely, 2^7842144194 is an apocalyptic number.

7842144194 is a deficient number, since it is larger than the sum of its proper divisors (3921072100).

7842144194 is a wasteful number, since it uses less digits than its factorization.

7842144194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3921072099.

The product of its digits is 258048, while the sum is 44.

The square root of 7842144194 is about 88555.8817583564. The cubic root of 7842144194 is about 1986.7578659481.

The spelling of 7842144194 in words is "seven billion, eight hundred forty-two million, one hundred forty-four thousand, one hundred ninety-four".