1605161215525 has 12 divisors (see below), whose sum is σ = 2274742751392. Its totient is φ = 1100681976240.

The previous prime is 1605161215477. The next prime is 1605161215531. The reversal of 1605161215525 is 5255121615061.

It is not a de Polignac number, because 1605161215525 - 2¹¹ = 1605161213477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4586174727 + ... + 4586175076.

Almost surely, 2^{1605161215525} is an apocalyptic number.

It is an amenable number.

1605161215525 is a deficient number, since it is larger than the sum of its proper divisors (669581535867).

1605161215525 is an equidigital number, since it uses as much as digits as its factorization.

1605161215525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9172349820 (or 9172349815 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 40.

The spelling of 1605161215525 in words is "one trillion, six hundred five billion, one hundred sixty-one million, two hundred fifteen thousand, five hundred twenty-five".