3685450816138 has 240 divisors, whose sum is σ = 7491337152768. Its totient is φ = 1349098027200.

The previous prime is 3685450816079. The next prime is 3685450816171. The reversal of 3685450816138 is 8316180545863.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1379800543 + ... + 1379803213.

Almost surely, 2^{3685450816138} is an apocalyptic number.

3685450816138 is an abundant number, since it is smaller than the sum of its proper divisors (3805886336630).

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

3685450816138 is a wasteful number, since it uses less digits than its factorization.

3685450816138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2799 (or 2747 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 58.

The spelling of 3685450816138 in words is "three trillion, six hundred eighty-five billion, four hundred fifty million, eight hundred sixteen thousand, one hundred thirty-eight".