4157894819 has 4 divisors (see below), whose sum is σ = 4477732896. Its totient is φ = 3838056744.

The previous prime is 4157894813. The next prime is 4157894827. The reversal of 4157894819 is 9184987514.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9184987514 = 2 ⋅4592493757.

It is a cyclic number.

It is not a de Polignac number, because 4157894819 - 2⁸ = 4157894563 is a prime.

It is a super-2 number, since 2×4157894819² = 34576178651734085522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4157894813) 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, 159919019 + ... + 159919044.

It is an arithmetic number, because the mean of its divisors is an integer number (1119433224).

Almost surely, 2^4157894819 is an apocalyptic number.

4157894819 is a deficient number, since it is larger than the sum of its proper divisors (319838077).

4157894819 is a wasteful number, since it uses less digits than its factorization.

4157894819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319838076.

The product of its digits is 2903040, while the sum is 56.

The square root of 4157894819 is about 64481.7401982918. The cubic root of 4157894819 is about 1608.0189642151.

The spelling of 4157894819 in words is "four billion, one hundred fifty-seven million, eight hundred ninety-four thousand, eight hundred nineteen".