1915660402688 has 54 divisors (see below), whose sum is σ = 3832308624879. Its totient is φ = 957579657216.

The previous prime is 1915660402673. The next prime is 1915660402727. The reversal of 1915660402688 is 8862040665191.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 957830201344 + 957830201344 = 978688^2 + 978688^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=978688.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 501086345 + ... + 501090167.

Almost surely, 2^{1915660402688} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1915660402688

1915660402688 is an abundant number, since it is smaller than the sum of its proper divisors (1916648222191).

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

1915660402688 is an frugal number, since it uses more digits than its factorization.

1915660402688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7680 (or 3825 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 1915660402688 in words is "one trillion, nine hundred fifteen billion, six hundred sixty million, four hundred two thousand, six hundred eighty-eight".