38181816001836 has 36 divisors (see below), whose sum is σ = 103939388006272. Its totient is φ = 11748251077344.

The previous prime is 38181816001817. The next prime is 38181816001837. The reversal of 38181816001836 is 63810061818183.

38181816001836 is a `hidden beast` number, since 3 + 8 + 1 + 8 + 18 + 1 + 600 + 18 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (38181816001837) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40792537996 + ... + 40792538931.

Almost surely, 2^{38181816001836} is an apocalyptic number.

38181816001836 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

38181816001836 is an abundant number, since it is smaller than the sum of its proper divisors (65757572004436).

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

38181816001836 is a wasteful number, since it uses less digits than its factorization.

38181816001836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81585076950 (or 81585076945 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The spelling of 38181816001836 in words is "thirty-eight trillion, one hundred eighty-one billion, eight hundred sixteen million, one thousand, eight hundred thirty-six".