4991640533 has 8 divisors (see below), whose sum is σ = 5447255520. Its totient is φ = 4536330480.

The previous prime is 4991640497. The next prime is 4991640581. The reversal of 4991640533 is 3350461994.

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

It is not a de Polignac number, because 4991640533 - 2¹⁰ = 4991639509 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 (4991640133) 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, 41303 + ... + 108116.

It is an arithmetic number, because the mean of its divisors is an integer number (680906940).

Almost surely, 2^4991640533 is an apocalyptic number.

It is an amenable number.

4991640533 is a deficient number, since it is larger than the sum of its proper divisors (455614987).

4991640533 is a wasteful number, since it uses less digits than its factorization.

4991640533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152467.

The product of its (nonzero) digits is 349920, while the sum is 44.

The square root of 4991640533 is about 70651.5430333974. The cubic root of 4991640533 is about 1709.0224492640.

The spelling of 4991640533 in words is "four billion, nine hundred ninety-one million, six hundred forty thousand, five hundred thirty-three".