1665453519552 has 56 divisors (see below), whose sum is σ = 4424949849600. Its totient is φ = 552828349696.

The previous prime is 1665453519529. The next prime is 1665453519563. The reversal of 1665453519552 is 2559153545661.

It is a junction number, because it is equal to n+sod(n) for n = 1665453519492 and 1665453519501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18101052 + ... + 18192827.

It is an arithmetic number, because the mean of its divisors is an integer number (79016961600).

Almost surely, 2^{1665453519552} is an apocalyptic number.

1665453519552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1665453519552 is an abundant number, since it is smaller than the sum of its proper divisors (2759496330048).

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

1665453519552 is a wasteful number, since it uses less digits than its factorization.

1665453519552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36294133 (or 36294123 counting only the distinct ones).

The product of its digits is 24300000, while the sum is 57.

The spelling of 1665453519552 in words is "one trillion, six hundred sixty-five billion, four hundred fifty-three million, five hundred nineteen thousand, five hundred fifty-two".