15916980555325 has 24 divisors (see below), whose sum is σ = 20007958062248. Its totient is φ = 12558818119680.

The previous prime is 15916980555323. The next prime is 15916980555353. The reversal of 15916980555325 is 52355508961951.

It can be written as a sum of positive squares in 12 ways, for example, as 7874657417124 + 8042323138201 = 2806182^2 + 2835899^2 .

It is not a de Polignac number, because 15916980555325 - 2¹ = 15916980555323 is a prime.

It is a super-4 number, since 4×15916980555325⁴ (a number of 54 digits) contains 4444 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 (15916980555323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86217517 + ... + 86401933.

Almost surely, 2^{15916980555325} is an apocalyptic number.

It is an amenable number.

15916980555325 is a deficient number, since it is larger than the sum of its proper divisors (4090977506923).

15916980555325 is a wasteful number, since it uses less digits than its factorization.

15916980555325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231793 (or 231788 counting only the distinct ones).

The product of its (nonzero) digits is 72900000, while the sum is 64.

The spelling of 15916980555325 in words is "fifteen trillion, nine hundred sixteen billion, nine hundred eighty million, five hundred fifty-five thousand, three hundred twenty-five".