1605161230552 has 128 divisors (see below), whose sum is σ = 3507423897600. Its totient is φ = 680602982400.

The previous prime is 1605161230499. The next prime is 1605161230591. The reversal of 1605161230552 is 2550321615061.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 76385727 + ... + 76406737.

It is an arithmetic number, because the mean of its divisors is an integer number (27401749200).

Almost surely, 2^{1605161230552} 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 1605161230552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1753711948800).

1605161230552 is an abundant number, since it is smaller than the sum of its proper divisors (1902262667048).

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

1605161230552 is a wasteful number, since it uses less digits than its factorization.

1605161230552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21497 (or 21493 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 1605161230552 in words is "one trillion, six hundred five billion, one hundred sixty-one million, two hundred thirty thousand, five hundred fifty-two".