161535346663 has 4 divisors (see below), whose sum is σ = 162355323240. Its totient is φ = 160715370088.

The previous prime is 161535346649. The next prime is 161535346673. The reversal of 161535346663 is 366643535161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366643535161 = 78539 ⋅4668299.

It is a cyclic number.

It is not a de Polignac number, because 161535346663 - 2¹⁷ = 161535215591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161535346603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409987993 + ... + 409988386.

It is an arithmetic number, because the mean of its divisors is an integer number (40588830810).

Almost surely, 2^161535346663 is an apocalyptic number.

161535346663 is a deficient number, since it is larger than the sum of its proper divisors (819976577).

161535346663 is an equidigital number, since it uses as much as digits as its factorization.

161535346663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819976576.

The product of its digits is 3499200, while the sum is 49.

The spelling of 161535346663 in words is "one hundred sixty-one billion, five hundred thirty-five million, three hundred forty-six thousand, six hundred sixty-three".