1969769881728 has 192 divisors, whose sum is σ = 6412530589920. Its totient is φ = 596899860480.

The previous prime is 1969769881721. The next prime is 1969769881769. The reversal of 1969769881728 is 8271889679691.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (1969769881721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2536425 + ... + 3220712.

Almost surely, 2^{1969769881728} is an apocalyptic number.

1969769881728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1969769881728 is an abundant number, since it is smaller than the sum of its proper divisors (4442760708192).

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

1969769881728 is an equidigital number, since it uses as much as digits as its factorization.

1969769881728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5757177 (or 5757153 counting only the distinct ones).

The product of its digits is 1316818944, while the sum is 81.

The spelling of 1969769881728 in words is "one trillion, nine hundred sixty-nine billion, seven hundred sixty-nine million, eight hundred eighty-one thousand, seven hundred twenty-eight".