4981238591 has 4 divisors (see below), whose sum is σ = 5692844112. Its totient is φ = 4269633072.

The previous prime is 4981238579. The next prime is 4981238599. The reversal of 4981238591 is 1958321894.

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

It is a cyclic number.

It is not a de Polignac number, because 4981238591 - 2¹⁰ = 4981237567 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 (4981238599) 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, 355802750 + ... + 355802763.

It is an arithmetic number, because the mean of its divisors is an integer number (1423211028).

Almost surely, 2^4981238591 is an apocalyptic number.

4981238591 is a deficient number, since it is larger than the sum of its proper divisors (711605521).

4981238591 is an equidigital number, since it uses as much as digits as its factorization.

4981238591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711605520.

The product of its digits is 622080, while the sum is 50.

The square root of 4981238591 is about 70577.8902419164. The cubic root of 4981238591 is about 1707.8344954552.

The spelling of 4981238591 in words is "four billion, nine hundred eighty-one million, two hundred thirty-eight thousand, five hundred ninety-one".