16557472613125 has 40 divisors (see below), whose sum is σ = 20973876679800. Its totient is φ = 13065106560000.

The previous prime is 16557472613119. The next prime is 16557472613153. The reversal of 16557472613125 is 52131627475561.

It can be written as a sum of positive squares in 20 ways, for example, as 16042772547649 + 514700065476 = 4005343^2 + 717426^2 .

It is not a de Polignac number, because 16557472613125 - 2³ = 16557472613117 is a prime.

It is a super-3 number, since 3×16557472613125³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 22386735 + ... + 23114515.

It is an arithmetic number, because the mean of its divisors is an integer number (524346916995).

Almost surely, 2^{16557472613125} is an apocalyptic number.

It is an amenable number.

16557472613125 is a deficient number, since it is larger than the sum of its proper divisors (4416404066675).

16557472613125 is an frugal number, since it uses more digits than its factorization.

16557472613125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728299 (or 728284 counting only the distinct ones).

The product of its digits is 10584000, while the sum is 55.

The spelling of 16557472613125 in words is "sixteen trillion, five hundred fifty-seven billion, four hundred seventy-two million, six hundred thirteen thousand, one hundred twenty-five".