15643530161 has 32 divisors (see below), whose sum is σ = 18830085120. Its totient is φ = 12718609344.

The previous prime is 15643530143. The next prime is 15643530173. The reversal of 15643530161 is 16103534651.

It is not a de Polignac number, because 15643530161 - 2¹⁰ = 15643529137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15643530121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1468691 + ... + 1479303.

It is an arithmetic number, because the mean of its divisors is an integer number (588440160).

Almost surely, 2^15643530161 is an apocalyptic number.

It is an amenable number.

15643530161 is a deficient number, since it is larger than the sum of its proper divisors (3186554959).

15643530161 is a wasteful number, since it uses less digits than its factorization.

15643530161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10805.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 15643530161 in words is "fifteen billion, six hundred forty-three million, five hundred thirty thousand, one hundred sixty-one".