3618715421 has 4 divisors (see below), whose sum is σ = 3831581052. Its totient is φ = 3405849792.

The previous prime is 3618715361. The next prime is 3618715427. The reversal of 3618715421 is 1245178163.

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 2971776196 + 646939225 = 54514^2 + 25435^2 .

It is a cyclic number.

It is not a de Polignac number, because 3618715421 - 2¹⁰ = 3618714397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3618715427) 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, 106432790 + ... + 106432823.

It is an arithmetic number, because the mean of its divisors is an integer number (957895263).

Almost surely, 2^3618715421 is an apocalyptic number.

It is an amenable number.

3618715421 is a deficient number, since it is larger than the sum of its proper divisors (212865631).

3618715421 is a wasteful number, since it uses less digits than its factorization.

3618715421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212865630.

The product of its digits is 40320, while the sum is 38.

The square root of 3618715421 is about 60155.7596660536. The cubic root of 3618715421 is about 1535.2701651816.

The spelling of 3618715421 in words is "three billion, six hundred eighteen million, seven hundred fifteen thousand, four hundred twenty-one".