16387522561 has 8 divisors (see below), whose sum is σ = 16523170560. Its totient is φ = 16252107168.

The previous prime is 16387522559. The next prime is 16387522601. The reversal of 16387522561 is 16522578361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16387522561 - 2¹ = 16387522559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16387522531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84780 + ... + 199906.

It is an arithmetic number, because the mean of its divisors is an integer number (2065396320).

Almost surely, 2^16387522561 is an apocalyptic number.

It is an amenable number.

16387522561 is a deficient number, since it is larger than the sum of its proper divisors (135647999).

16387522561 is a wasteful number, since it uses less digits than its factorization.

16387522561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116303.

The product of its digits is 604800, while the sum is 46.

The spelling of 16387522561 in words is "sixteen billion, three hundred eighty-seven million, five hundred twenty-two thousand, five hundred sixty-one".