3815851685604 has 120 divisors (see below), whose sum is σ = 10403861320608. Its totient is φ = 1088471260800.

The previous prime is 3815851685573. The next prime is 3815851685651. The reversal of 3815851685604 is 4065861585183.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17669679 + ... + 17884329.

Almost surely, 2^{3815851685604} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3815851685604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5201930660304).

3815851685604 is an abundant number, since it is smaller than the sum of its proper divisors (6588009635004).

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

3815851685604 is a wasteful number, since it uses less digits than its factorization.

3815851685604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215303 (or 215280 counting only the distinct ones).

The product of its (nonzero) digits is 27648000, while the sum is 60.

The spelling of 3815851685604 in words is "three trillion, eight hundred fifteen billion, eight hundred fifty-one million, six hundred eighty-five thousand, six hundred four".