16265128787165 has 16 divisors (see below), whose sum is σ = 19855410033600. Its totient is φ = 12787409133312.

The previous prime is 16265128787153. The next prime is 16265128787203. The reversal of 16265128787165 is 56178782156261.

It is a cyclic number.

It is not a de Polignac number, because 16265128787165 - 2⁶ = 16265128787101 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8032460 + ... + 9851429.

It is an arithmetic number, because the mean of its divisors is an integer number (1240963127100).

Almost surely, 2^{16265128787165} is an apocalyptic number.

It is an amenable number.

16265128787165 is a deficient number, since it is larger than the sum of its proper divisors (3590281246435).

16265128787165 is a wasteful number, since it uses less digits than its factorization.

16265128787165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17887036.

The product of its digits is 67737600, while the sum is 65.

The spelling of 16265128787165 in words is "sixteen trillion, two hundred sixty-five billion, one hundred twenty-eight million, seven hundred eighty-seven thousand, one hundred sixty-five".