75857645 has 8 divisors (see below), whose sum is σ = 91143960. Its totient is φ = 60609600.

The previous prime is 75857641. The next prime is 75857653. The reversal of 75857645 is 54675857.

It can be written as a sum of positive squares in 4 ways, for example, as 45796 + 75811849 = 214^2 + 8707^2 .

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

It is not a de Polignac number, because 75857645 - 2² = 75857641 is a prime.

It is a super-3 number, since 3×75857645³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 75857645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75857641) 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, 5006 + ... + 13295.

It is an arithmetic number, because the mean of its divisors is an integer number (11392995).

Almost surely, 2^75857645 is an apocalyptic number.

It is an amenable number.

75857645 is a deficient number, since it is larger than the sum of its proper divisors (15286315).

75857645 is a wasteful number, since it uses less digits than its factorization.

75857645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19135.

The product of its digits is 1176000, while the sum is 47.

The square root of 75857645 is about 8709.6294410268. The cubic root of 75857645 is about 423.3177235376.

The spelling of 75857645 in words is "seventy-five million, eight hundred fifty-seven thousand, six hundred forty-five".