4906591491 has 4 divisors (see below), whose sum is σ = 6542121992. Its totient is φ = 3271060992.

The previous prime is 4906591471. The next prime is 4906591499. The reversal of 4906591491 is 1941956094.

It is a happy number.

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

It is not a de Polignac number, because 4906591491 - 2¹⁸ = 4906329347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4906591491.

It is not an unprimeable number, because it can be changed into a prime (4906591499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817765246 + ... + 817765251.

It is an arithmetic number, because the mean of its divisors is an integer number (1635530498).

Almost surely, 2^4906591491 is an apocalyptic number.

4906591491 is a deficient number, since it is larger than the sum of its proper divisors (1635530501).

4906591491 is a wasteful number, since it uses less digits than its factorization.

4906591491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635530500.

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 4906591491 is about 70047.0662554828. The cubic root of 4906591491 is about 1699.2605193267.

The spelling of 4906591491 in words is "four billion, nine hundred six million, five hundred ninety-one thousand, four hundred ninety-one".