4745187991 has 4 divisors (see below), whose sum is σ = 4798504800. Its totient is φ = 4691871184.

The previous prime is 4745187973. The next prime is 4745188001. The reversal of 4745187991 is 1997815474.

It is a happy number.

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 4745187991 - 2⁹ = 4745187479 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 (4745187961) 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, 26658271 + ... + 26658448.

It is an arithmetic number, because the mean of its divisors is an integer number (1199626200).

Almost surely, 2^4745187991 is an apocalyptic number.

4745187991 is a deficient number, since it is larger than the sum of its proper divisors (53316809).

4745187991 is an equidigital number, since it uses as much as digits as its factorization.

4745187991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53316808.

The product of its digits is 2540160, while the sum is 55.

The square root of 4745187991 is about 68885.3249320928. The cubic root of 4745187991 is about 1680.4198675395.

The spelling of 4745187991 in words is "four billion, seven hundred forty-five million, one hundred eighty-seven thousand, nine hundred ninety-one".