4539361991 has 8 divisors (see below), whose sum is σ = 4783236480. Its totient is φ = 4295983608.

The previous prime is 4539361969. The next prime is 4539361999. The reversal of 4539361991 is 1991639354.

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 4539361991 - 2⁶ = 4539361927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4539361999) 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, 105161 + ... + 141906.

It is an arithmetic number, because the mean of its divisors is an integer number (597904560).

Almost surely, 2^4539361991 is an apocalyptic number.

4539361991 is a deficient number, since it is larger than the sum of its proper divisors (243874489).

4539361991 is a wasteful number, since it uses less digits than its factorization.

4539361991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248053.

The product of its digits is 787320, while the sum is 50.

The square root of 4539361991 is about 67374.7875024478. The cubic root of 4539361991 is about 1655.7633765339.

The spelling of 4539361991 in words is "four billion, five hundred thirty-nine million, three hundred sixty-one thousand, nine hundred ninety-one".