4564157891 has 4 divisors (see below), whose sum is σ = 4573305000. Its totient is φ = 4555010784.

The previous prime is 4564157887. The next prime is 4564157893. The reversal of 4564157891 is 1987514654.

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 4564157891 - 2² = 4564157887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4564157893) 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, 4572806 + ... + 4573803.

It is an arithmetic number, because the mean of its divisors is an integer number (1143326250).

Almost surely, 2^4564157891 is an apocalyptic number.

4564157891 is a deficient number, since it is larger than the sum of its proper divisors (9147109).

4564157891 is an equidigital number, since it uses as much as digits as its factorization.

4564157891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9147108.

The product of its digits is 1209600, while the sum is 50.

The square root of 4564157891 is about 67558.5515756518. The cubic root of 4564157891 is about 1658.7727285039.

The spelling of 4564157891 in words is "four billion, five hundred sixty-four million, one hundred fifty-seven thousand, eight hundred ninety-one".