4919539109581 has 4 divisors (see below), whose sum is σ = 4967301625312. Its totient is φ = 4871776593852.

The previous prime is 4919539109579. The next prime is 4919539109599. The reversal of 4919539109581 is 1859019359194.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4919539109581 - 2¹ = 4919539109579 is a prime.

It is a super-2 number, since 2×4919539109581² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4919539109561) 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, 23881257711 + ... + 23881257916.

It is an arithmetic number, because the mean of its divisors is an integer number (1241825406328).

Almost surely, 2^{4919539109581} is an apocalyptic number.

It is an amenable number.

4919539109581 is a deficient number, since it is larger than the sum of its proper divisors (47762515731).

4919539109581 is a wasteful number, since it uses less digits than its factorization.

4919539109581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47762515730.

The product of its (nonzero) digits is 15746400, while the sum is 64.

The spelling of 4919539109581 in words is "four trillion, nine hundred nineteen billion, five hundred thirty-nine million, one hundred nine thousand, five hundred eighty-one".