3842121178513 has 4 divisors (see below), whose sum is σ = 3842354375860. Its totient is φ = 3841887981168.

The previous prime is 3842121178501. The next prime is 3842121178573. The reversal of 3842121178513 is 3158711212483.

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 1752266407824 + 2089854770689 = 1323732^2 + 1445633^2 .

It is a cyclic number.

It is not a de Polignac number, because 3842121178513 - 2⁹ = 3842121178001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3842121178573) 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, 116573958 + ... + 116606911.

It is an arithmetic number, because the mean of its divisors is an integer number (960588593965).

Almost surely, 2^{3842121178513} is an apocalyptic number.

It is an amenable number.

3842121178513 is a deficient number, since it is larger than the sum of its proper divisors (233197347).

3842121178513 is a wasteful number, since it uses less digits than its factorization.

3842121178513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233197346.

The product of its digits is 322560, while the sum is 46.

The spelling of 3842121178513 in words is "three trillion, eight hundred forty-two billion, one hundred twenty-one million, one hundred seventy-eight thousand, five hundred thirteen".