18179529952516 has 81 divisors (see below), whose sum is σ = 33046687709301. Its totient is φ = 8750639410656.

The previous prime is 18179529952513. The next prime is 18179529952517. The reversal of 18179529952516 is 61525992597181.

It is a happy number.

The square root of 18179529952516 is 4263746.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 18072276322500 + 107253630016 = 4251150^2 + 327496^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18179529952513) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 26853071970 + ... + 26853072646.

Almost surely, 2^{18179529952516} is an apocalyptic number.

18179529952516 is the 4263746-th square number.

It is an amenable number.

18179529952516 is a deficient number, since it is larger than the sum of its proper divisors (14867157756785).

18179529952516 is an frugal number, since it uses more digits than its factorization.

18179529952516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586 (or 793 counting only the distinct ones).

The product of its digits is 122472000, while the sum is 70.

The spelling of 18179529952516 in words is "eighteen trillion, one hundred seventy-nine billion, five hundred twenty-nine million, nine hundred fifty-two thousand, five hundred sixteen".