6781574033 has 6 divisors (see below), whose sum is σ = 7343361414. Its totient is φ = 6259914336.

The previous prime is 6781574021. The next prime is 6781574039. The reversal of 6781574033 is 3304751876.

It can be written as a sum of positive squares in 3 ways, for example, as 383493889 + 6398080144 = 19583^2 + 79988^2 .

It is not a de Polignac number, because 6781574033 - 2⁶ = 6781573969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6781574039) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20063660 + ... + 20063997.

It is an arithmetic number, because the mean of its divisors is an integer number (1223893569).

Almost surely, 2^6781574033 is an apocalyptic number.

It is an amenable number.

6781574033 is a deficient number, since it is larger than the sum of its proper divisors (561787381).

6781574033 is a wasteful number, since it uses less digits than its factorization.

6781574033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40127683 (or 40127670 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The square root of 6781574033 is about 82350.3128895088. The cubic root of 6781574033 is about 1892.8237172742.

The spelling of 6781574033 in words is "six billion, seven hundred eighty-one million, five hundred seventy-four thousand, thirty-three".