849671778500 has 48 divisors (see below), whose sum is σ = 1856778526512. Its totient is φ = 339668096000.

The previous prime is 849671778407. The next prime is 849671778511. The reversal of 849671778500 is 5877176948.

It can be written as a sum of positive squares in 8 ways, for example, as 202573806724 + 647097971776 = 450082^2 + 804424^2 .

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 347810 + ... + 1349190.

It is an arithmetic number, because the mean of its divisors is an integer number (38682885969).

Almost surely, 2^849671778500 is an apocalyptic number.

It is an amenable number.

849671778500 is an abundant number, since it is smaller than the sum of its proper divisors (1007106748012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

849671778500 is a wasteful number, since it uses less digits than its factorization.

849671778500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003097 (or 1003085 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 62.

The spelling of 849671778500 in words is "eight hundred forty-nine billion, six hundred seventy-one million, seven hundred seventy-eight thousand, five hundred".