1838396065408 has 64 divisors (see below), whose sum is σ = 4431847694400. Its totient is φ = 741537902592.

The previous prime is 1838396065379. The next prime is 1838396065421. The reversal of 1838396065408 is 8045606938381.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60331278 + ... + 60361741.

It is an arithmetic number, because the mean of its divisors is an integer number (69247620225).

Almost surely, 2^{1838396065408} is an apocalyptic number.

It is an amenable number.

1838396065408 is an abundant number, since it is smaller than the sum of its proper divisors (2593451628992).

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

1838396065408 is a wasteful number, since it uses less digits than its factorization.

1838396065408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120693057 (or 120693045 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 61.

The spelling of 1838396065408 in words is "one trillion, eight hundred thirty-eight billion, three hundred ninety-six million, sixty-five thousand, four hundred eight".