4519317891 has 8 divisors (see below), whose sum is σ = 6573553344. Its totient is φ = 2738980520.

The previous prime is 4519317889. The next prime is 4519317911. The reversal of 4519317891 is 1987139154.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4519317891 - 2¹ = 4519317889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4519317891.

It is not an unprimeable number, because it can be changed into a prime (4519317841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68474481 + ... + 68474546.

It is an arithmetic number, because the mean of its divisors is an integer number (821694168).

Almost surely, 2^4519317891 is an apocalyptic number.

4519317891 is a deficient number, since it is larger than the sum of its proper divisors (2054235453).

4519317891 is a wasteful number, since it uses less digits than its factorization.

4519317891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136949041.

The product of its digits is 272160, while the sum is 48.

The square root of 4519317891 is about 67225.8721847474. The cubic root of 4519317891 is about 1653.3227063907.

The spelling of 4519317891 in words is "four billion, five hundred nineteen million, three hundred seventeen thousand, eight hundred ninety-one".