785618849 has 4 divisors (see below), whose sum is σ = 788300436. Its totient is φ = 782937264.

The previous prime is 785618837. The next prime is 785618851. The reversal of 785618849 is 948816587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 948816587 = 643 ⋅1475609.

It can be written as a sum of positive squares in 2 ways, for example, as 721298449 + 64320400 = 26857^2 + 8020^2 .

It is a cyclic number.

It is not a de Polignac number, because 785618849 - 2¹⁶ = 785553313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 785618794 and 785618803.

It is not an unprimeable number, because it can be changed into a prime (785618809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1340354 + ... + 1340939.

It is an arithmetic number, because the mean of its divisors is an integer number (197075109).

Almost surely, 2^785618849 is an apocalyptic number.

It is an amenable number.

785618849 is a deficient number, since it is larger than the sum of its proper divisors (2681587).

785618849 is a wasteful number, since it uses less digits than its factorization.

785618849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681586.

The product of its digits is 3870720, while the sum is 56.

The square root of 785618849 is about 28028.8931105030. The cubic root of 785618849 is about 922.7214819638.

The spelling of 785618849 in words is "seven hundred eighty-five million, six hundred eighteen thousand, eight hundred forty-nine".