14955320918521 has 27 divisors (see below), whose sum is σ = 16041568181709. Its totient is φ = 13939779708288.

The previous prime is 14955320918491. The next prime is 14955320918567. The reversal of 14955320918521 is 12581902355941.

The square root of 14955320918521 is 3867211.

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

It can be written as a sum of positive squares in 4 ways, for example, as 3411390530025 + 11543930388496 = 1846995^2 + 3397636^2 .

It is not a de Polignac number, because 14955320918521 - 2¹⁹ = 14955320394233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14955320718521) 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 26 ways as a sum of consecutive naturals, for example, 7165940940 + ... + 7165943026.

Almost surely, 2^{14955320918521} is an apocalyptic number.

14955320918521 is the 3867211-st square number.

14955320918521 is the 1933606-th centered octagonal number.

It is an amenable number.

14955320918521 is a deficient number, since it is larger than the sum of its proper divisors (1086247263188).

14955320918521 is an frugal number, since it uses more digits than its factorization.

14955320918521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4426 (or 2213 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 55.

The spelling of 14955320918521 in words is "fourteen trillion, nine hundred fifty-five billion, three hundred twenty million, nine hundred eighteen thousand, five hundred twenty-one".