1605161215524 has 96 divisors (see below), whose sum is σ = 4022348875776. Its totient is φ = 496388354560.

The previous prime is 1605161215477. The next prime is 1605161215531. The reversal of 1605161215524 is 4255121615061.

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, 111563059 + ... + 111577445.

It is an arithmetic number, because the mean of its divisors is an integer number (41899467456).

Almost surely, 2^{1605161215524} 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 1605161215524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2011174437888).

1605161215524 is an abundant number, since it is smaller than the sum of its proper divisors (2417187660252).

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

1605161215524 is a wasteful number, since it uses less digits than its factorization.

1605161215524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22185 (or 22183 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The spelling of 1605161215524 in words is "one trillion, six hundred five billion, one hundred sixty-one million, two hundred fifteen thousand, five hundred twenty-four".