16603770641 has 4 divisors (see below), whose sum is σ = 16630594800. Its totient is φ = 16576946484.

The previous prime is 16603770629. The next prime is 16603770661. The reversal of 16603770641 is 14607730661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16603770641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16603770611) 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, 13411151 + ... + 13412388.

It is an arithmetic number, because the mean of its divisors is an integer number (4157648700).

Almost surely, 2^16603770641 is an apocalyptic number.

It is an amenable number.

16603770641 is a deficient number, since it is larger than the sum of its proper divisors (26824159).

16603770641 is an equidigital number, since it uses as much as digits as its factorization.

16603770641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26824158.

The product of its (nonzero) digits is 127008, while the sum is 41.

The spelling of 16603770641 in words is "sixteen billion, six hundred three million, seven hundred seventy thousand, six hundred forty-one".