35784509857 has 4 divisors (see below), whose sum is σ = 35797510980. Its totient is φ = 35771508736.

The previous prime is 35784509791. The next prime is 35784509861. The reversal of 35784509857 is 75890548753.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75890548753 = 15269 ⋅4970237.

It can be written as a sum of positive squares in 2 ways, for example, as 31300332561 + 4484177296 = 176919^2 + 66964^2 .

It is a cyclic number.

It is not a de Polignac number, because 35784509857 - 2¹¹ = 35784507809 is a prime.

It is a super-2 number, since 2×35784509857² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 35784509795 and 35784509804.

It is not an unprimeable number, because it can be changed into a prime (35784509867) 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, 6496432 + ... + 6501937.

It is an arithmetic number, because the mean of its divisors is an integer number (8949377745).

Almost surely, 2^35784509857 is an apocalyptic number.

It is an amenable number.

35784509857 is a deficient number, since it is larger than the sum of its proper divisors (13001123).

35784509857 is a wasteful number, since it uses less digits than its factorization.

35784509857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13001122.

The product of its (nonzero) digits is 42336000, while the sum is 61.

The spelling of 35784509857 in words is "thirty-five billion, seven hundred eighty-four million, five hundred nine thousand, eight hundred fifty-seven".