4197857645 has 8 divisors (see below), whose sum is σ = 5038083960. Its totient is φ = 3357849600.

The previous prime is 4197857623. The next prime is 4197857659. The reversal of 4197857645 is 5467587914.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 325658116 + 3872199529 = 18046^2 + 62227^2 .

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

It is not a de Polignac number, because 4197857645 - 2²⁶ = 4130748781 is a prime.

It is a super-3 number, since 3×4197857645³ (a number of 30 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8756 + ... + 92045.

It is an arithmetic number, because the mean of its divisors is an integer number (629760495).

Almost surely, 2^4197857645 is an apocalyptic number.

It is an amenable number.

4197857645 is a deficient number, since it is larger than the sum of its proper divisors (840226315).

4197857645 is a wasteful number, since it uses less digits than its factorization.

4197857645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109135.

The product of its digits is 8467200, while the sum is 56.

The square root of 4197857645 is about 64790.8762481262. The cubic root of 4197857645 is about 1613.1542710402.

The spelling of 4197857645 in words is "four billion, one hundred ninety-seven million, eight hundred fifty-seven thousand, six hundred forty-five".