16125638794 has 4 divisors (see below), whose sum is σ = 24188458194. Its totient is φ = 8062819396.

The previous prime is 16125638773. The next prime is 16125638797. The reversal of 16125638794 is 49783652161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15940325025 + 185313769 = 126255^2 + 13613^2 .

It is not an unprimeable number, because it can be changed into a prime (16125638797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4031409697 + ... + 4031409700.

Almost surely, 2^16125638794 is an apocalyptic number.

16125638794 is a deficient number, since it is larger than the sum of its proper divisors (8062819400).

16125638794 is an equidigital number, since it uses as much as digits as its factorization.

16125638794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8062819399.

The product of its digits is 2177280, while the sum is 52.

The spelling of 16125638794 in words is "sixteen billion, one hundred twenty-five million, six hundred thirty-eight thousand, seven hundred ninety-four".