1601153215505 has 48 divisors (see below), whose sum is σ = 2115217523520. Its totient is φ = 1161918041088.

The previous prime is 1601153215499. The next prime is 1601153215507. The reversal of 1601153215505 is 5055123511061.

It is not a de Polignac number, because 1601153215505 - 2¹⁶ = 1601153149969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1601153215507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23558582 + ... + 23626448.

It is an arithmetic number, because the mean of its divisors is an integer number (44067031740).

Almost surely, 2^{1601153215505} is an apocalyptic number.

It is an amenable number.

1601153215505 is a deficient number, since it is larger than the sum of its proper divisors (514064308015).

1601153215505 is a wasteful number, since it uses less digits than its factorization.

1601153215505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68498 (or 68481 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 35.

Adding to 1601153215505 its reverse (5055123511061), we get a palindrome (6656276726566).

The spelling of 1601153215505 in words is "one trillion, six hundred one billion, one hundred fifty-three million, two hundred fifteen thousand, five hundred five".