3616078878721 has 4 divisors (see below), whose sum is σ = 3616093682244. Its totient is φ = 3616064075200.

The previous prime is 3616078878703. The next prime is 3616078878749. The reversal of 3616078878721 is 1278788706163.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 935118010225 + 2680960868496 = 967015^2 + 1637364^2 .

It is a cyclic number.

It is not a de Polignac number, because 3616078878721 - 2¹¹ = 3616078876673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3616078878761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7029100 + ... + 7525981.

It is an arithmetic number, because the mean of its divisors is an integer number (904023420561).

Almost surely, 2^{3616078878721} is an apocalyptic number.

It is an amenable number.

3616078878721 is a deficient number, since it is larger than the sum of its proper divisors (14803523).

3616078878721 is a wasteful number, since it uses less digits than its factorization.

3616078878721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14803522.

The product of its (nonzero) digits is 37933056, while the sum is 64.

The spelling of 3616078878721 in words is "three trillion, six hundred sixteen billion, seventy-eight million, eight hundred seventy-eight thousand, seven hundred twenty-one".