16239137725 has 12 divisors (see below), whose sum is σ = 20516466996. Its totient is φ = 12746190080.

The previous prime is 16239137723. The next prime is 16239137779. The reversal of 16239137725 is 52773193261.

It can be written as a sum of positive squares in 6 ways, for example, as 91336249 + 16147801476 = 9557^2 + 127074^2 .

It is not a de Polignac number, because 16239137725 - 2¹ = 16239137723 is a prime.

It is a super-3 number, since 3×16239137725³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16239137723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6126652 + ... + 6129301.

It is an arithmetic number, because the mean of its divisors is an integer number (1709705583).

Almost surely, 2^16239137725 is an apocalyptic number.

It is an amenable number.

16239137725 is a deficient number, since it is larger than the sum of its proper divisors (4277329271).

16239137725 is a wasteful number, since it uses less digits than its factorization.

16239137725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12256016 (or 12256011 counting only the distinct ones).

The product of its digits is 476280, while the sum is 46.

The spelling of 16239137725 in words is "sixteen billion, two hundred thirty-nine million, one hundred thirty-seven thousand, seven hundred twenty-five".