38685404121840 has 240 divisors, whose sum is σ = 151637378300928. Its totient is φ = 8654242328064.

The previous prime is 38685404121781. The next prime is 38685404121863. The reversal of 38685404121840 is 4812140458683.

38685404121840 is a `hidden beast` number, since 3 + 8 + 6 + 8 + 5 + 40 + 412 + 184 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81419242 + ... + 81893001.

Almost surely, 2^{38685404121840} is an apocalyptic number.

38685404121840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38685404121840 is an abundant number, since it is smaller than the sum of its proper divisors (112951974179088).

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

38685404121840 is a wasteful number, since it uses less digits than its factorization.

38685404121840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163312316 (or 163312307 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 54.

The spelling of 38685404121840 in words is "thirty-eight trillion, six hundred eighty-five billion, four hundred four million, one hundred twenty-one thousand, eight hundred forty".