16801008138 has 12 divisors (see below), whose sum is σ = 36402184338. Its totient is φ = 5600336040.

The previous prime is 16801008097. The next prime is 16801008157. The reversal of 16801008138 is 83180010861.

It can be written as a sum of positive squares in only one way, i.e., 9623021409 + 7177986729 = 98097^2 + 84723^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 466694653 + ... + 466694688.

Almost surely, 2^16801008138 is an apocalyptic number.

16801008138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16801008138 is an abundant number, since it is smaller than the sum of its proper divisors (19601176200).

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

16801008138 is a wasteful number, since it uses less digits than its factorization.

16801008138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933389349 (or 933389346 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

Adding to 16801008138 its reverse (83180010861), we get a palindrome (99981018999).

The spelling of 16801008138 in words is "sixteen billion, eight hundred one million, eight thousand, one hundred thirty-eight".