16396139838 has 32 divisors (see below), whose sum is σ = 37392104736. Its totient is φ = 4748203008.

The previous prime is 16396139807. The next prime is 16396139839. The reversal of 16396139838 is 83893169361.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16396139839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6181231 + ... + 6183882.

It is an arithmetic number, because the mean of its divisors is an integer number (1168503273).

Almost surely, 2^16396139838 is an apocalyptic number.

16396139838 is an abundant number, since it is smaller than the sum of its proper divisors (20995964898).

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

16396139838 is a wasteful number, since it uses less digits than its factorization.

16396139838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12365148.

The product of its digits is 5038848, while the sum is 57.

The spelling of 16396139838 in words is "sixteen billion, three hundred ninety-six million, one hundred thirty-nine thousand, eight hundred thirty-eight".