16634403145 has 4 divisors (see below), whose sum is σ = 19961283780. Its totient is φ = 13307522512.

The previous prime is 16634403053. The next prime is 16634403167. The reversal of 16634403145 is 54130443661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12713013504 + 3921389641 = 112752^2 + 62621^2 .

It is a cyclic number.

It is not a de Polignac number, because 16634403145 - 2⁷ = 16634403017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1663440310 + ... + 1663440319.

It is an arithmetic number, because the mean of its divisors is an integer number (4990320945).

Almost surely, 2^16634403145 is an apocalyptic number.

It is an amenable number.

16634403145 is a deficient number, since it is larger than the sum of its proper divisors (3326880635).

16634403145 is an equidigital number, since it uses as much as digits as its factorization.

16634403145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326880634.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 16634403145 in words is "sixteen billion, six hundred thirty-four million, four hundred three thousand, one hundred forty-five".