19115145966828 has 12 divisors (see below), whose sum is σ = 44602007255960. Its totient is φ = 6371715322272.

The previous prime is 19115145966821. The next prime is 19115145966841. The reversal of 19115145966828 is 82866954151191.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (19115145966821) 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 3 ways as a sum of consecutive naturals, for example, 796464415273 + ... + 796464415296.

Almost surely, 2^{19115145966828} is an apocalyptic number.

It is an amenable number.

19115145966828 is an abundant number, since it is smaller than the sum of its proper divisors (25486861289132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19115145966828 is a wasteful number, since it uses less digits than its factorization.

19115145966828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592928830576 (or 1592928830574 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 66.

The spelling of 19115145966828 in words is "nineteen trillion, one hundred fifteen billion, one hundred forty-five million, nine hundred sixty-six thousand, eight hundred twenty-eight".