4857051891 has 4 divisors (see below), whose sum is σ = 6476069192. Its totient is φ = 3238034592.

The previous prime is 4857051869. The next prime is 4857051893. The reversal of 4857051891 is 1981507584.

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 4857051891 - 2⁷ = 4857051763 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 4857051891.

It is not an unprimeable number, because it can be changed into a prime (4857051893) 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, 809508646 + ... + 809508651.

It is an arithmetic number, because the mean of its divisors is an integer number (1619017298).

Almost surely, 2^4857051891 is an apocalyptic number.

4857051891 is a deficient number, since it is larger than the sum of its proper divisors (1619017301).

4857051891 is a wasteful number, since it uses less digits than its factorization.

4857051891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619017300.

The product of its (nonzero) digits is 403200, while the sum is 48.

The square root of 4857051891 is about 69692.5526222135. The cubic root of 4857051891 is about 1693.5222794006.

The spelling of 4857051891 in words is "four billion, eight hundred fifty-seven million, fifty-one thousand, eight hundred ninety-one".