16111121875625 has 30 divisors (see below), whose sum is σ = 23419389841650. Its totient is φ = 11047626408000.

The previous prime is 16111121875601. The next prime is 16111121875679. The reversal of 16111121875625 is 52657812111161.

It can be written as a sum of positive squares in 5 ways, for example, as 9782013119641 + 6329108755984 = 3127621^2 + 2515772^2 .

It is not a de Polignac number, because 16111121875625 - 2⁸ = 16111121875369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16111121875625.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 263008100 + ... + 263069349.

It is an arithmetic number, because the mean of its divisors is an integer number (780646328055).

Almost surely, 2^{16111121875625} is an apocalyptic number.

It is an amenable number.

16111121875625 is a deficient number, since it is larger than the sum of its proper divisors (7308267966025).

16111121875625 is an frugal number, since it uses more digits than its factorization.

16111121875625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526077483 (or 526077461 counting only the distinct ones).

The product of its digits is 201600, while the sum is 47.

Adding to 16111121875625 its reverse (52657812111161), we get a palindrome (68768933986786).

The spelling of 16111121875625 in words is "sixteen trillion, one hundred eleven billion, one hundred twenty-one million, eight hundred seventy-five thousand, six hundred twenty-five".