13850138178 has 18 divisors (see below), whose sum is σ = 30009714579. Its totient is φ = 4616546292.

The previous prime is 13850138171. The next prime is 13850138201. The reversal of 13850138178 is 87183105831.

13850138178 is a `hidden beast` number, since 138 + 501 + 3 + 8 + 1 + 7 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6925069089 + 6925069089 = 83217^2 + 83217^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=83217.

It is not an unprimeable number, because it can be changed into a prime (13850138171) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 485433 + ... + 513171.

Almost surely, 2^13850138178 is an apocalyptic number.

13850138178 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13850138178 is an abundant number, since it is smaller than the sum of its proper divisors (16159576401).

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

13850138178 is an frugal number, since it uses more digits than its factorization.

13850138178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55486 (or 27744 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 13850138178 in words is "thirteen billion, eight hundred fifty million, one hundred thirty-eight thousand, one hundred seventy-eight".